Huh, I haven't gotten any reports about those bugs until now. I just gave it a try again myself to check and didn't encounter that. The only thing I can think of is, did you get hit by an arrow right before going through the portal, and were you flashing when you arrived on the other side? I forgot to put something there to block that trap from hitting you in the portal.
As for the error/crash, do you remember the error message, or what was happening in the game in the couple of seconds before the crash? Maybe something didn't get initialized properly on the scene transition somehow.
Thanks for giving the game a try!