One thing is the financial problems of the club (which the players may not even feel because their financial interaction with the club is in accordance with the contract), and another thing is the change of ownership, which can lead to a radical change in the policy of the club. In the second case, the future becomes very uncertain and this affects the players because they think about it. Professionals, of course, know how to abstract and do their job no matter what, but still, at least a little bit, it affects them.