Maybe genetic but looks like you could have broad mites. If the irregular growth continues I would consider taking steps to eliminate them.
Broad mites live in the tips of the new growth. Their saliva is toxic and is the cause of the burnt/blistered look in the new leaves.
If indeed you do have broad mites you will need to get an effective miticide. Preferably two. Rotation is important in dealing with mites.
Forbid 4F and Pylon are two effective miticides. The Pylon comes in a TR (total release) fogger that isn't very expensive compared to
Forbid 4F.
They have to be handled with extreme safety precautions and only in veg.
Hopefully your issue isn't mites and your plant(s) will grow out of it.