Ran into a softlock on free version, PC. After hitting Ch 6? (gather shards for Zee) I turned on Autocrawl in Thicc Mountain and about halfway through it borked while fighting a Frost Imp. Specifically it came down to the last card in the hand being a boost card, and since there's no other cards to play it on, all I can do is turn on/off Autocrawl and select/deselect the boost card (pic included). 
I noticed throughout the dungeons every so often (both in and out of fights) it would go to the last card without refilling the hand until *after* playing the card, but the game would hang before playing the card for 5-10 seconds. I had assumed it had something to do with my (old) processor, but I'm not sure. This occurrence wasn't anything more than a very minor annoyance until it completely softlocked.