Few things:
Excess N
Light leaks
Too small a pot for that plant
Excess Mg
All those can cause that weird clawing. Anecdotally, blueberry derivatives are said to do it quite easily.

You need a gallon of soil per foot of plant.
No N past week 2 of flower, if even that.
Go in at 'night' and look for leaks.

The claws won't heal, but overall plant health can be stabilized by fixing the issue(s), and you can apply the lesson next round.