L3VI

Just picked up my s6 from service and I notice a very strange difference regards turn signal: When I active blinker, the second light up stays longer than normal and then back to it used to be, the same thing happens on both side, and i also find out, during the first two light up, the rear always half second behind front. Simply means when front light up the rear still no show, it lights up right after the front goes off, and then somehow it catch the front. basicly, the front stay longer when it second light up to wait for rear to catch. I put on hazard they function correctly. I feel very cofused since i cant find anyone has the same problem. What do you guys think? what may cause the issue? i really dont wanna drive 1 hr to dealer，so hope somebody can help me out.

DB22