You are drowning them .... if you water til it runs out and wait 5 minutes to get it to stop then you are OVERWATERING. LED GROWS will not dry out as quickly as other light systems so spacing out feeds AND watering is a given.
Everytime you OVERWATER to the point of runoff , you are actually leaching the soil. Roots become smothered and leaves droop. You should be lifting containers ( when complete dry ) to judge if watering is needed. In 3 gallon fabrics i add no more than say 3 or 4 cups water thats it.
You NEED to drop led panel to 18” as blurple penetration drops off a cliff as you raise light . Some run them a foot above canopy . Autos are finicky and any unnecessary stress ... water , feed , overfeed etc. can impact it. They are plug and play type plants.
Plants will droop for a number of reasons , i would have fan moving air ACROSS all plants , they need to move and oxygenate. Plants droop when they get ready to “ power down “ at end of light cycle day too. But most of the time its user error.