It seems to be a problem of the entrances being blocked by the world generation of the crimson forest biome and since I haven't seen it happen anywhere else I'll take the guess to say it only happens there. 

I've attached a short clip of me being inside the door and the door being absent (visually) but being interactable which caused me to be stuck inside it.

I put the gag "run breaking" since it only forces you to leave the run and doesn't affect the game after that like weapon glitches might.

I hope you fix this soon and I am looking forward to a response id be willing to give further information if it will help fixing the bug.