TextEntry receives focus when (probably) shouldn't
I have submitted a question to StackOverflow detailing the issue I have found. As I have not received any answers/suggestions, I am usure if this is an actual bug, or I've been incorrect in my code, so this the next port of call.
In a Notebook which contains a TextEntry and other widgets, when switching to the tab with the TextEntry, the TextEntry receives the focus, irrespective of the API calls I've made to set the focus to other widgets.
My environment is as follows: Ubuntu 18.04.5 Python 3.6.9 GTK 3.22.30
Is this a bug or have I not made the correct API calls to control the focus?