Here are the step to reproduce:
Create a new document or draw something in a document.
With the outline selection tool, try to select all of the canvas (startpoint and endpoint outside of the canvas)
Result is no selection

Now make a selection inside the canvas (it works) 
Redo the first selection (now it works)
Draw something and redo the first selection (it doesn't works)

I use krita 3.0.93 appimage.