K12 Petrol: 10min after parking engine does not accept gas, and goes out

Hello in the round! today for the first time, my Mickrig (65hp, 1.2L) let me down…Cars usually start immediately, whether cold or warm. Today it was a little different: after a short parking (about 10min) in front of a shop, I wanted to go straight home. So sit back in, engine starts as usual, but to my surprise the engine goes off when starting up…uppps, I would (usually) not have an engine!? Jumps also directly again, but goes again at the A After that he didn’t feel like it anymore, and didn’t jump any more…after a few futile attempts, I decided to drink a coffee for the first time, and tried it again half an hour later, this time with success…but after just under a kilometer he went out again… about 20min later he jumped again, and managed the approx. 6km to home without interruption… Sure, the worst thing would be the notorious “long chain”…. which became at about 120T in 2014 g I think that none of the old chains were used for reperaturing… Car has now 195T down… as I said, normal zero problems with it, always jumps directly, runs round, takes the gas very willingly, and has power, which is more reminiscent of 80hp, instead of the nominal 65hp I hope of course that it is nothing great (thanks to Corona for months not coming into my cash register…) Sensor check (crankshaft and or camshaft) possible itself?