Hey there, bringing another issue to the table here!
Sometimes when I add a new tilemap and place it in the editor, all other tilemaps disappear from the viewing window. When I scroll in and out it zooms DRAMATICALLY up and down - way more than usual, and only displays one tilemap at a time (etiher the old ones or the new one when the new one is the only one on the screen).
I know this is probably something I'm doing wrong, but I haven't done anything differently with this one than the others that I know of. is there some kind of method I should use to make sure my tilemaps are .. compatible?