Julen Lopetegui on Thursday held a face-to-face meeting with Howard Webb at Wolves' training ground to discuss the refereeing decisions the club have suffered in their last two games.
At Liverpool last Saturday, Toti Gomes thought he had scored a late winner for Wolves in the FA Cup third-round tie, only for it to be disallowed and VAR incorrectly to uphold the decision.
Then in the closing stages of Wednesday's Carabao Cup tie at Nottingham Forest, Matheus Nunes was denied a penalty despite appearing to be clipped by Emmanuel Dennis.