Hi islauro, thank you for taking the time to report this bug!
This looks annoying indeed. Unfortunately I haven't been able to reproduce this bug.
Do you have any details the help reproduce this issue, like ne number of tabs open, a specific youtube page that triggers the bug, or anything else?
On another note, would you be able to update the content blockers, and see if it fixes the issue?
(See in Settings → 🛡️ Content Blockers)

Thank you for your help in making Orion a better browser!