Bug: Boom labs puzzle 4 of the last lethal set (Electra) won't load. It just stays stuck like in the screenshot below, I tried reloading a few times. I play on Android,
LETHAL PUZZLE: OwlTK Mirror One-More-Win-to-Legend Boss Fight : r/ hearthstone
Puzzle Lab: Puzzles involving the changed basic Priest cards have not been updated, rendering several impossible · Issue #1318 · HearthSim/hs-bugs · GitHub