Not all genetics have fat bladed leaves.
new growth in the 2nd pic looks worse. This could be too much p or k, but i don't know which symptoms occur first to rule it out. I'd expect other visible symptoms.
You mention 45DLI -- this makes me lean toward light-related. Drop that back to 35-40... This should cover the error of the phone apps... phones are not 500 usd quantum sensors. they convert klux, whether they say it or not, and that is not a one-size-fits-all conversion factor. Depedning on CCT and maybe even CRI you will get different measurements for the same PAR due to different light properties.