Sudden change of chemistry on my fc 25 team

With four Premier League players on the team, Isak and Songhummin, who used to be in the Premier League, were chemistry max. (Until this morning)
I opened PS5 this afternoon and for some reason the chemistry was down one. And no members were replaced at all.
Also, other premier league players have no chemistry drop. In other words, only Songhummin and Isaac are down.
I have read in other reports that this phenomenon occurs when EVO is in progress, but the EVO is already over for the players in this case