Exactly @lotus710 , you know your thing.
And please please compare the so many VPD charts online with each other …
Notice the huge differences?
VPD = Leaf temp (IR gun to do manual or IR Cam to log) + RH + room Temp
The standard 3 inputs to calculate the correct VPD.
I estimate the VPD of this grow 1.6 VPD or higher. The problem does start there.