If you add Anchor behavior to Text or BBText then set Bottom Edge anchor to Window Bottom, then run the preview. The game will freeze. No message, no nothing.
Just remove the text or bbtext that said it will make the game freeze. And the game will no longer freeze. Re add the text from object window to scene again and it will freeze again.
Might be similar problem:
In the other note… I don’t think anchor behavior was behaving like what I expected from it. If I set window bottom to a sprite, it will strectch down like a melted cheese.