Nute burn. That clawing remind nitrogen toxicity, but colour is very healthy.... That rust/burn - definitely aftermath of nutes.
In my recent grow i got such burn mark with very picky girl. I added one additive , 1/3 strength and still got. After some time, that girl could eat anything. Burn marks faded with time ...
I had a question about it even :
growdiaries.com/grow-questions/85730-plagron-nutes
That clawing could be from : if that girl stands in corner or under fan, that could be possible answer too : wind burn or high humidity with temps, aka vpd is wrong.