I already signed this player but managed to reproduce it for other one. He is Frank Odhiambo. All I did is agreed with his first offer, and locked the release clause and then offered him better contract and increased the release clause(that's important part that there is no disagreement to what he agreed previously). Then you can increase it infinitely.
The save is called release-clause-bug.fm
I even recorded a video with it:
It's the same thing as in FM20, FM21, FM22, I think it was reported as well, but you ignored it so here it is again.
But if there is new player coming to a game he might think that this is normal thing, and if agent agrees then okay - everything works "fine", when in reality it's just bug being here straight for 4 editions or maybe even more.