Player spawned at wrong location when reloading the world

Spawned into a saved game at a different location than where I had left.

I was at bedrock upon save; ~Y=-61.  I am not certain (didn't record coordinates) but it seems that I spawned at the same X/Z coordinates in a cave directly above where I had saved, ~Y=-23.

Seems very similar to old resolved issue MCPE-41934.