I'd also say fungal or insect damage.
To me 'wilted' means the soft stems are bending down - extra water will usually help and the tips stand up within minutes.
This looks more like the new leaves are not opening out fully - deformed leaves rather than what I understand as wilted but that's just terminology.
Symptoms like this are usually transient here and later leaves open normal so you may choose to treat or just hold off and see what happens. Spacing the plants should allow more air and may solve the problem too.