Display Issues on WordPress Site

I’m encountering an intermittent issue with my WordPress site where it sometimes does not display correctly. The issue seems to resolve itself without any intervention, but it keeps recurring. I have checked for common problems like caching, plugin conflicts, and theme issues, but I have not identified the root cause.

I observed the following errors in the browser console when the issue occurs

uag-css-259.css:1 Failed to load resource: the server responded with a status of 404 ()
uag-js-259.js:1 Failed to load resource: the server responded with a status of 404 ()