@b4n, looking at notebook.c it appears that the scintilla widget is focussed on the button-release event. And it is easier to provoke the problem by clicking on the tab and holding the button down, ie artificially delaying the button-release. Then sometimes when the button is released it seems to get ignored and the widget does not get focus and so does not update.

If the button-release can get lost in normal operation too then that would explain it.

Why is the focus on button-release which is an indeterminate time in the future, instead of when the switch signal happens?

—
Reply to this email directly or view it on GitHub.