According to most journalists I follow on Twitter, indeed it looks different to his previoius injury (not a relapse), though no news on the extent of this new "discomfort"..No news on Dembouz either
I think it's all got to do with the mental strength and the player's determination to succeed (or not). While gifted technically, Mesut never had that blessing of mental strength...And yes, many (not all) players are the same, unfortunately
Still being lacklustre in the Turkish league (though it cannot be ignored that he is still lacking match fitness)...It almost looks as though he has been through with football mentally.
Sad to see how far he has fallen.