Weird leaves on some plants

[artha]

This is first time when i see something like this. Only couple of plants has some weird leaves, can it be from overwatering or what else can be?

 

[LoveGrowingIt]

There are a few potential causes: High heat, low humidity or high light intensity.

 

[PotPlatoon]

Yo, dude, maybe try adjusting the humidity levels.