I have created my drawing sheet files (different for schematic and different for PCB (this one containing only small cross at 0,0 absolute position)) long time ago. Then I selected my files (separately in schematic and in PCB) in File-??? menu (sorry can’t be more specific now, as I have no KiCad here to check and don’t remember) - the place where you specify date, PCB name and revision to be used in drawing sheet.
Then I have never any problems with that, but I didn’t tried V9 yet.
I always start new design by copying and renaming an old one so since then (2017) I had never any need to think about drawing sheet files again.
Not sure if it helps, but may be…