borders from media bar after reloading the page

[Series95]

Describe the bug
When reloading the page I have the following borders from the media bar, I use the experimental support for the media bar
only visible for a short time and when the page is fully loaded they disappear

Screenshots

ElegantFin:

• Version [Latest]

Jellyfin Server:

• Version [e.g. 10.11.1]