Mobile navigation not working on Firefox

[LeanderG]

See the attached video. The mobile navigation bar gets hidden on Firefox before I can click it.
https://github.com/user-attachments/assets/50952cf7-d0de-4d07-b741-44d52e7c2e5b

[LeanderG]

I just tried again and it's working much better all off a sudden. No idea why.
https://github.com/user-attachments/assets/165866c1-817c-4bfe-806b-d7404a282a10