Cayman S 3.4 Facelift problems with gas acceptance!

Hello friends. I have a little problem and hope someone can help me there. I’ve been on the 3rd gear (only the 3rd gear) power problems or gas acceptance problems lately. It looks like this. I’m driving on the highway wants to give gas on the acceleration strip and there’s just 3 sec. I’m in the 3rd gear at 2500-3000 turn/s and it accelerates as if I was in the 6th or so as if I had a turboloch (I know I don’t have turbo) The whole thing happened Unfortunately only rarely, however, the PZ could not help me. No error read out bla bla . It happens even only at full throttle and in the 3rd – Refueled always super plus 98 – Always warm driven – currently 63000km I thought about the clutch first however the speed does not go high so does not turn over. At the moment I give gas I also don’t hear the engine / exhaust sound or something. Just as if I had given light gas. Has someone had such a problem or something like that?