The warning comes as the Hong Kong billionaire refused to give the go-ahead to Steve Bruce's new contract.
"We seem to be on shifting sands at the moment and that isn't the best thing," he told the Sunday Mirror.
"We have given our word that we will sell and we are people of integrity.
"Mr Yeung has said to us that Steve Bruce, Karren Brady, David Sullivan and myself will remain to keep the club running in the right direction, and we have to expect that he is also a man of integrity.
"We are trying to convince the potential new owners it would be in everybody's interests for them to make clear their intentions. Steve is obviously concerned and that will not help anybody."
Bruce is worried the whole saga could affect the players and agrees that it is in the best interests of the club to finalise the takeover as soon as possible.
He told the Sunday Mirror, "At the moment it's very difficult to paint the picture anything but gloomily.
"That is wrong for the club because if a slight chink of instability, any slight crack appears people jump on it.
"We have got off to a decent start this season and I believe we have the makings of a decent young team."