AsNoriuanswered grow question 2 years ago first one is mechanical damage in crowd or first sign of nitrogen excess
second is thrips maybe, guessing some pests
if some bugs, use natural predators .
in UK we have that shop, find whats working and try to buy that at yours
https://www.dragonfli.co.uk/collections/nematodes?src=GAds&gclid=CjwKCAjwp9qZBhBkEiwAsYFsbxk26MCuPNjxmS9e0KCRun2hRMwhGlfvawSsFHZEh8dA2HflNSQ_DRoCIXQQAvD_BwE
sticky traps, good watering regime, tidy grow area is a MUST anyway now, not only as prevention in future