Save Button Remains Inactive Post File Modification

[PaltryProgrammer]

version 2.9.0.3054
greetings kind regards
please see attached gif demonstrate upon modification of file the [Save] [button] remains inactive .
thank you kindly

[stefankueng]

I'm sorry, but I can not reproduce this at all. Tried several files, several options, always works for me.
From the gif I see it's not just the button but the tab also does not change to indicate a modification.