Equipping the Serendipity Ring with a pair of gauntlets with the ‘healing increased by X% of current durability’ enchantment leads to instant heals from food.
Correct behaviour, with just the ring:
Instant healing, with the gauntlets on:
Completely reproducible for me, not so much for a friend.
(On the plus side, this way the Serendipity Ring provides the full 30% healing increase as opposed to missing a tick of healing at the end as usual.)
I’ve only tested with gloves. Since your post, I have, at great cost to my character’s ability to enjoy clam chowder ever again, tested several more. I’ll list all eight enchantments that could have broken interactions. Five increase healing:
Heart’s Desire
healing increased on magical chest armour (tested, bugged)
healing increased by durability on plagued gloves (initial test; video above, bugged)
healing increased by durability on magical gloves (tested, bugged)
healing increased at low focus on plagued helmets (tested, bugged)
Three additional ones decrease healing:
healing reduced if no enemies are nearby, on plagued bows (tested, not bugged)
healing reduced for each enemy nearby, on plagued melee weapons; this is a separate enchantment with separate percentages
healing reduced on plagued chest armour
There is no increased healing on weapons. I forgot for a brief moment that the game illogically uses ‘gauntlet’ to refer to weapons and ‘glove’ to refer to armour for wrists or hands. Is this why you spoke of weapon types, or is there some enchantment I haven’t seen?
(I should point out that a friend of mine is unable to reproduce the bug. Perhaps I can figure out where our methods diverge.)
No worries, I wouldn’t report an issue with legacy gear.
But since you kindly reminded me, I’ve checked my old items. I have the durability-based enchantment on a bow and shield (and they both break the healing-over-time), but not a melee weapon. If you still have one (or a Heart’s Desire) and feel like trying it, that’d be a nice contribution.
For now, I assume any healing increase does the trick.
(Since you still write that you ‘think’ you understand, you may be better served by the moving pictures I included above. Perhaps they will finally clarify the matter. )
edit: the gif’s are not my prefered method of conveying information, if you can use screenshots or clips going forward please (gif is to blurry and can’t be fullscreened)