I can reliably replicate this, particularly with any keybinds that use the Ctrl key. However, my issue in particular is with Ctrl + F, and, unlike in the video above, even after deselecting an object, the script editor does not react to Ctrl + F, unless I close a script (can be either the affected one or a different script, similar fix to [Temporary Fix] Select, Move, Scale, and Rotate permanently grayed out after opening scripts).
Notably, however, Ctrl + Shift + F will work regardless.