The customer's website experiences intermittent loading issues where the browser only partially renders the interface, resulting in missing images and styles.

Safari displays "blue question marks" as if the page has only loaded 60%. However, upon reloading the page, everything goes back to normal.
The query is whether the issue could be due to the browser cache or DNS, or if there is a need to change hosting providers.

If the host is responsible, there can be restrictions on your account's hosting capabilities, connections from a single IP, connection speeds from a single IP, and clogged server channels.

On the other hand, if the host is not responsible, your incoming channel may be clogged, there could be an issue with your router connections (such as with torrents), or you may be experiencing problems with your internet provider.

Are the js, css, and pictures served through nginx as static files?
Do the js scripts load at the bottom of the page?
Is it possible to download js/css from third-party CDN sites?

With so many options available to improve website speed, including adjusting caching and layout curves, experimenting with buffer and stream sizes on the web server, and more, it can be overwhelming to know where to start.
best first step is to disable all caches and optimizers like apc and memkesh.
beginning with optimizers, cryptographers, and other speed-enhancing tools tends to yield the most effective results.

The issue described is often associated with problems in the website's hosting or delivery, rather than the browser or DNS. However, before deciding to change hosting providers, there are a few things that you should consider checking or testing:

Browser Cache: Clear the cache and cookies of your browsers and see if that resolves the problem. A corrupted cache may affect the way your website is displayed.

Content Delivery Network (CDN): If the site is using a CDN, it could be a geographic issue with the CDN's servers not properly delivering certain files to certain areas. Depending on the settings of your CDN, it may not be correctly caching and delivering your files. It'd be worth looking into your CDN configuration if you have one.

DNS Resolution: While DNS issues would typically lead to the site not being reachable at all, rather than partially loading, in rare cases a misconfigured DNS could potentially lead to these kinds of problems. Make sure your domain's DNS A record is correctly pointing to your server's IP address.

Server Resources: Ensure your server has enough resources (RAM, CPU, Disk IO) to handle the demand.

Hosting Provider: If the server resources seem sufficient and there aren't any obvious errors in the website's code, the issue could be due to the hosting provider. There could be network issues between your users and your host, or perhaps the hosting provider is low on resources leading to intermittent issues. Reviewing server logs and optionally using services to monitor uptime can help to identify if this is the case.

Optimization: The website might not be adequately optimized, meaning that items aren't being loaded as quickly and efficiently as possible. Issues could stem from not having enough compression on your images, not optimizing your CSS or JS files, or similar.

Consider working with an experienced web developer who can analyze these things for you and find a solution. Some of these checks might need advanced skills, such as being able to look into HTTP logs and DNS records, or understanding routing issues. If the problems persist across these checks and varying geolocations, then it might be time to consider changing your hosting provider.

If you've done some preliminary checks and the problem still persists, more in-depth troubleshooting may be needed. In these cases, consider exploring the following:

Web Developer Tools: Use the browser's developer tools (network panel) to see the loading of each file. You will be able to identify if there are files that are always failing to load when the site partially renders. If there's a common cause or pattern here, it can help you focus your troubleshooting.

Website Source Code: Check for code flaws that might be causing this issue. Some plugins or code snippets may load assets inefficiently or may conflict with each other. This is especially relevant with the rise of JavaScript frameworks like React, Angular, or Vue, which can cause your page to load incompletely if there's a failure to load or execute a script due to an error in the code.

SSL/TLS Configuration: Misconfigurations in the certificate chain or cipher suite may produce intermittent connection errors, especially visible if different clients/devices/browsers are being used. For example, TLS 1.3 might not be properly supported in older devices or browsers. Ensuring the server is correctly configured for SSL/TLS is essential.

HTTP/2 or HTTP/3 Issues: If your server is using HTTP/2 or the newer HTTP/3 protocol, there might be issues with certain web browsers supporting or handling these protocols.

Server Configuration: If the server itself is misconfigured (for instance, if .htaccess rules are improperly set up, if there's a bad NGINX or Apache config, or if the MIME types served by your server aren't being correctly recognized by browsers), it could cause assets to fail to load.

Hosting Environment: Make sure your hosting environment meets the requirements of your website platform (like Wordpress, Drupal, Magento etc.). Some platforms have specific server requirements and if those are not fulfilled, it might create issues.

Third-Party Integrations: Check for possible issues caused by third-party integrations, such as plugins and APIs. They may not be handling connectivity or loading issues gracefully, leading to problems with your site loading.


In order to provide additional advice, I will delve into even more technical possibilities which could be at the root of the problem. These are advanced topics that require expertise both in web development and in networking. If things continue to malfunction despite trying the previous suggestions, you might want to consult with a professional. Here are a few more areas to consider:

Check for Mixed Content: If your site is served over HTTPS, but you have HTTP content (images, scripts, stylesheets, etc.), some browsers may block this mixed content, causing partially loaded pages. Check your site for mixed content issues.

Perform Web Vitals and Performance audit: Tools like Google's Lighthouse or PageSpeed Insights could give you insights into specific aspects that might be disrupting the loading process and thus provide direction for optimization.

Check Load Balancing: If your website uses load balancing or has a failover setup in place, cross-check if these mechanisms are functioning correctly. An improperly configured load balancer may lead to inconsistent behavior and partially loaded content.

DDoS Protection Measures: Some hosting providers might have DDoS protection mechanisms which, when triggered, can disrupt the loading of your site. Understand how these systems work at your hosting provider, and consider speaking to their support to ask if this might be the issue.

Website Firewall Settings: If a web application firewall (WAF) is active, it might be blocking or filtering certain requests which can lead to a partial page load. Check the configuration of your WAF, if you have one.

Compression and Minification: Ensure that all files are being properly compressed and minified for transfer. Sometimes, a server may fail to adequately gzip or deflate files, or a minification process can cause errors in scripts or stylesheets that prevent them from fully loading.

Network Profiling: If you are familiar with networking tools like Wireshark or TCPDump, getting a packet capture while reproducing the problem could point you to network-related issues, like a faulty TCP handshake, dropped packets or retry logic faults. Please note that this type of analysis requires advanced knowledge of networking protocols.

I had also same query, thank you for the reply on this post.
software development company

Full website loading may result from server issues, poor internet connectivity, or excessive website elements. Optimize server performance, reduce file sizes, and ensure stable internet for consistent loading.

If there are too many people accessing the site at once, it can cause webpages to load slowly because web servers have to wait for requests from individual browsers. Learn more about 4 Secret Tricks to Actually fix Slow Loading Websites. Third, the website might be overloaded with data.

If your page is slow to load or stuck on loading: Check you internet connection. Clear your browser's cache and cookies and restart your web browser. Try a different web browser.

If your page is slow to load or stuck on loading: Check you internet connection. Clear your browser's cache and cookies and restart your web browser. Try a different web browser.