Mystery Flowering Problem in Hydro

I have a strange flowering issue. Ususally after about the 4th week the flowering stops and reverts back to veg. The flowers begin to stretch and grow leaves. There's is definitely no lighting problem. I'm running RO water with House and Garden nutes with CalMag, no more than 1200ppm. It's a recirculating drip system on 4x4 tables in hydroton. The solutiuon is no more than 78 F / 25 C. Also usind Drip clean and Hydrogen Perxide to keep bacteria from developing at that temp. Any help greatly appreciated

do you know the light cycle?

Make 100% sure there is no light leaks... even a tiny pinhole will bring on major problems. Ive seen this happen before. And always 12/12! Good luck.

The only way they revert back to veg is if the lighting goes on longer than the 12/12. You can speed em up by adding one more hour sleep (in conjunction with 1 less for awake hours) and you can also prolong them by doing the opposite. I've never had a plant revert back due to light leaks but it does throw off their cycles a bit. To say there is no problems with your lighting is an overstatement.

There is definitely no light leaks. I heard before that Nitrogen toxicity can cause this but I'm not sure where that would come from? Thanks for the replies

Plants don't just revert to vegetative growth for no reason. You either have A) a light leak, or B) your light cycle changed. Make absolutely sure they are getting 12/12.

If it isn't a light issue then the only thing I can think of is security. Does anyone else know about your grow that would be curious enough to peek in and let unwanted light in?