Kill it manany ideas on what has caused this problem would help
64% RH
perfect PH
1/2 nutes
Rockwool plugs
coco
only difference between this and the healthy ones are their position in the grow room
top pic is the deformed
bottom pic is its neighbor
View attachment 3185400 View attachment 3185402
Looks fine the leaves are fat. They will either go to normal looking leaves or stay that way no big deal.
I have the same problem with one of my seedlings oilmaker68, no harm in just letting it grow and see what happens.