Spoilers for endgame content ahead:

It seems like there are multiple "stuff" that doesn't work properly in the endgame, I was wondering if there was any statement about if it will ever be patched?
From what I noticed:
The clockwork bow upgrade does not work.
The clockwork sword upgrade has weird hit-detection & animation delay.
The Shroom-waive upgrades are unobtainable.
The catacomb on the floating island (the one only reachable by ship) can't be opened (Unless no-one has found the key yet?).
(And no clockwork upgrade for the ship? although that might be on purpose)