Northen light small yellow spots

Hey man Nice looking plant fear not this is not a serious issuse I have had a look intently at the pictures and I can summarize its most likely down to PH fluctuations the reason I have come to this conclusion is because that the fresh growth does not seem to be effected meaning its not spreading and will most likely clear its self up quite quickly though bit of advice un tie her. an y training to autoflowers will slow them down dramatically they will also not grow as fast as if they were not trained. Alot of people tend not to train auto flowers because it causes them too much stress :) Hope this helps bro overall she will make it this is in no way a severe case will clear up in a week or so be replaced with fresh green growth :) 👊