Some zombie villager textures are inconsistent with their living counterparts. The notable ones I found were:
Weaponsmith: Missing gloves, black lines near the middle of the arms (caused by copy-pasting the villager texture; the villager's gloves end at the zombie villager's arms), brown parts on the eye patch.
Armorer: Missing gloves, brown part under the mask is arguable whether it's inconsistent.
Nitwit: Sleeves cut off at a straight line, with no tattering.
Mason: Missing gloves.
Leatherworker (Not in picture): Missing gloves.
Please check if this is still an issue for you in 1.16 Release Candidate 1 or later.