Sometimes 3 days in the dark help to reset hormonal system .
And small pots can be a stress inducer .
AT WORST, it is early enough in the season to restart something from seeds.
Try 20h light / 4h dark . It's a little better to avoïd Calcium & Magnesium deficiencies, those are already watchable on your plants .
No dark period = heavy feeding program .
Try to reduce all the stress factors .
They don't try to flower, they are clearly flowering !
Stay positive dude, and perhaps pop some more seeds quickly.