Hey!
Often the Grav Cache for .css files breaks. I have no clue why - It worked again by resetting or tweaking permissions - but since it always comes back it seems to be a general problem somewhere. It happens to the admin plugin, as well as for the general frontend.
Hi, I’ve got a similar issue, the CSS and JS breaks as soon as I refresh my browser cache… Setting css_pipeline: true and js_pipeline: true in the system.yaml file also causes do to that issue.