I ve seen it on Roy Ferenčina and Mislav Karoglan profiles also (Slaven Belupo and Hajduk Split). And when I go to club history -> Managers it says the manager joined in 2011 and has been in charge for 12 years (that s on profile Slaven Belupo for example). I ve noticed that is happening for managers that have been in charge for specific club sometime in past and now they are again managers of that club.