When you get damaged by a mob it deals "true damage", ignoring Resistance potion effect. Also when you die you always get the message "<player_name> died" instead of a mob specific message.

I'll try to work on this soon. I modify damage sources with Imperishable and completely forgot about certain aspects; I may in fact remove that functionality altogether so that Imperishable is only for tools.

Thanks for letting me know!

Not sure why I closed this. Re-opening because I've just finished re-working Imperishable for armor to work... well, better.

Ok, now it's fixed. See 279e6ca