Having this problem yesterday and today, every time I press play in playmode the tilemap reverts to a previous set up I had a couple of days ago. As soon as I stop it, it goes back to the latest layout I had done in the editor. This does not change if I re-commit the tilemap and only happens in playmode as stated. I checked tileMapData file and the tileMapEditor file and they are both dated 2 days ago. I am only using these files in one scene on one new tilemap so no other scenes or tilemaps could be interfering with these files.
Any cause for this or solution?