Ctrl+A does not work first time when ctrl+shift+a binding is also present
I can't show it, but here in the Russian layout you need to press alt+A twice to achieve the effect.
Peek_2021-04-19_03-11
In GtkSourceView, this affects ctrl+a (GtkTextView) vs ctrl+shift+a (GtkSourceView) bindings.
Edited by Christian Hergert