There is an editing issue with wxTextCtrl in some environments including mine. See this thread for details:
https://forums.wxwidgets.org/viewtopic.php?f=1&t=42440
The reason I post here is an FYI that C::B's project creation dialogs have this issue in my environment.
What is the purpose of this post? Is there some action the cb team could/should do to fix your problem?