Did u use Florakeen or Sledgehammer or some ‘flushing agent’? If not thats a low amount of water to be flushing with…
If flushing to correct ph, it may look to balance it but its not enough to correct off balance soil.
If flushing to clear ppms. Urs are still high so id keep flushing til under 400 and then feed at whatever schedule you were at or heading towards.
If flushing just because ur going to flower, u still wanna do both those things above.
Long story short. If flushing without a flushing agent it takes minimal of 3-5 gallons of water in a 5 gallon pot.