EDIT: The softlock has been patched. See the original message below.
I have found a bug/softlock.
TLDR: don't do Spikes stacking build.
I got stuck on the 2nd boss because of two reasons. One, these enemies do not attack you directly, so spikes don't proc. Two, the enemies have nerfed my attack power so much that my sword deals 0 damage. They just keep debuffing and I can't continue nor suicide.
Otherwise, incredible game, love it!