Opening Find Bar with the mod uplifted the whole browser in Single Toolbar mode

I'm on v1.13t, Firefox 139.0, 2025-05-24 build.

Pressing Ctrl+F will uplift the whole browser. I had to hover the tab sidebar (#navigator-toolbox?) to get it back to where it belong before.
Only happen in Single Toolbar mode with Compact Mode off, but I can see it getting annoying for users in that mode.

https://github.com/user-attachments/assets/9fbcc1dc-462a-4d32-abdc-fc159fb9e813