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High bro, I am new to diagnosing plant problems, but I think that looks like problems with the PH? It reminds me of the photos on https://www.growweedeasy.com/ph-fluctuations-cannabis Are you checking the PH before you water? Also that soil looks very rocky, I don't know if that matter it is just an observation. Hopefully somebody good at this can help you out. Also, depending your native language you might have more luck in an international forum. https://www.icmag.com/ic/forumdisplay.php?f=27 Good luck bro!
Ditto on the ph idea that spotting is a telltale sign the plant under that nifty humidity dome looks better though. Maybe there's some watering issues here contributing to the ph problem. How often are you watering them and how much? Also what kind of soil/nutes are you using?