2 possible bugs:
1. Penance actually puts a card from your hand back to deck before drawing so if you have no deck you will put one card back there and then immediately draw it back to your hand. I can't find any issue with how it works now. Got any more details if you got it to somehow generate endless cards?
2. Yes the gem generation (or actually reverting them back) had some issues (on other levels too). They sometimes indeed were semi-permanent even though they shouldn't. Fixed already for the next patch.
On #1, the game was duplicating a card in my hand. I forgot the details, but it was either:
If I stepped on multiple Penance at one move, my hand grew larger. I remember that I had like 3 cards in my hand at one point, but had 7 to 8 cards after a move. I had like 5 Magna Carta at that point. I also had Wildcard on Penance (red <-> purple and orange <-> purple).
Just to make sure, this started happening after using Rejuvenating Toxicant.
