Hey there, so ph can definitely cause so extremely various results, are you checking the outgoing water as well as incoming? If your ph is fairly reasonable even with the strips, my next thought would be possibly wind and air movement, because that'll cause some twisting and unusual shapes even if the air flow isn't extremely strong, but waving the plant around.
Your leaves don't look very disrupted to me, so I'd just keep a close eye and watch for any changes. If it gets worse then examine some options and maybe look into watering practices too, over and under.
Happy growing. Congrats on the 1st grow.✌️
