Toffee pudding auto first grow

Days 14-21 Watered with de-chlorinated tap water ph 6.2 Plant 1 developed the spots in the middle of the leaves again, not really sure why can someone help? I removed half of the soil and replaced with plain soil on day 15 and watered no nutrients more spots on the leaves day 18, I’ve fed master root and master grow at half the recommended dose on day 21 to see if it helps at all as unsure the problem Plant 2 seems to have light burn so I moved the lights further away. I have 2 different plants in this grow tent along with these and these are the only two with issues so far 😅 anyone got any advice for me please?