I would like to join in on the bug report but the outcome of my tests is not quite clear.
character with ki 5, 25 bab, 6 dex modifier, deep vigilante on pgcc
resting with empty glove slot:
31 ab as expected, 1 blud damage bonus from unknown source
equipping gloves (with no properties, no ab bonus) > ab raises to 33, damage bonus is now +1 blud and +7 blud > unequipping gloves > ab raises to 35, blud damage bonus is now just +7, without the previous +1 property.
resting with gloves equipped:
31 ab, +1 blud damage > unequipping gloves > ab raises to 35, damage becomes +7, the +1 blud damage is gone.
My own conclusion, but it might be false because it's confusing:
- I have no idea where this +1 blud is coming from in either configuration.
- the +7 blud looks a lot like the +7 blud I was always getting on a ki 5 monk, 3 from passive ki 3, and 4 from ki 4 and 5, as expected, except in this case it is inconsistent.
- the ab looks like it counts the ki 5 after unequipping gloves, and does not count it when gloves are worn. Confirmed by smacking mobs, not just looking at the sheet.
I have not tested DR penetration but I think the OP's conclusion does not surprise me because of all the other glitchy behavior going on and I have a STRONG feeling that the DR pen works when the ab is granted but doesnt work when gloves are equipped and the ab is not granted.