u/External-morning3634

So these are (I believe) counterfeit shimano 105 pedals I bought off eBay. I haven’t had any issues with them whatsoever. However, the left pedal threads tight after a long 1.5/2hr ride. I noticed that the right pedal does thread in and out, but it’s not affected by the cranks turning. I like it because it really makes my leg and and knee aligned when I have the left pedal out equal to where the right pedal is, but after a long a ride it slowly is tightening and my leg/knee is not straight after a long period of spinning. Is it supposed to be this way? Should I just get real shimano pedals? Pls help