Some bugs:
1) I had a case where my tiles were getting duplicated when I was stepping on 2-3 penance gems one after another. My guess is that because I was at the end of the deck, the second penance started to shuffle before the first penance had finished "delivering" its shuffled tile.
This happened multiple times before I made the recording
2) I have cases where a gem from a pylon can get permanently added to a tile. I can't tell for sure when it happens. The one from today I had a tile with blue gem, a purple pylon added a purple gem to it and I was stuck with that for the next levels.
3) I tried the daily in a new browser - the pylon colors are not the same between runs
4) Placing a tile affected by green pylon generated a blank, without it, there would be an empty spot that would be struck by lightning. Instead of recognising the blank, the lightning still struck and reduced the hp (better watch the video)