I've also been unable to re-enter the cave. I went in, found the wayshrine right there, and paid a visit to town to unload gear and restock supplies (having just gone through that orc fight with three level 5 characters). Of course, I couldn't get back in after that; teleporting or entering via the front just results in a crash while the loading screen is up.
(Yes, I did send in those crash reports, so I hope this can get fixed in the next update!)
