Mine is pretty new and my left crank came off completely at British gravel champs. It was torqued to the exact Magene specs. I've reached out to Panda Podium for a replacement preload bolt.

Same here. I brought the whole system including cranks and chainrings. No matter if I used different spacers or even mounted it on different bikes the left crank arm gets always lose after a few kilometers. One day it even fall completely off. I was just happy not crashing. After contacting the seller. I think it’s a mangene dealer on AliExpress (not Magene itself) they offered me a reparation on my own costs or a new screw only of I buy other stuff in their store. By the way the power data was always very fluctuating. Does anyone has the issue with sellers? Should I contact Magene directly?