I made a issue on GitHub, but essentially if you open one project and the switch projects, sometimes the tiles in the new project get replaced with the ones from the old project, which breaks everything. The block that are effected are these:
Usually this one gets replaced with just the 16x16 transparent tile…
And these get replaced with the tile art from the previous project…
Which is really weird!
Anyways I just wanted to warn people and also mention that some other bugs might be caused by this weird project switching thing. Also, if you are often switching back and forth between projects, I’m wondering if you are experiencing those other bugs, like the sprite kind deletion bug, more often than people who don’t? Just a thought.