Android on a tablet.
I use split screen, text on one side, notes on the other. When first opening or creating a note my keyboard (gboard) pops up fine. If I minimize it or scroll through the text in the other screen, it disappears and touching back in the note doesn't bring the keyboard up again. I have to close out of the note and reopen it - horrible for longer running notes.
Is this a bug or limitation of the software?