Crypt Luscens with Wavy Leaves

[Blaha]

I have some Luscens, and it's been doing pretty great and popping up leaves and getting larger. Some of the larger leaves that have been around a while are getting wiggly around the edges. I give root tabs at a rate of 1 near each plant once a month, but I gave an extra tab to this one a week ago.

Is this normal?

My parameters:
6.8-7.2 ph
~75 degrees
Hard water
No ammonia or chlorine
Nitrates are a bit high but not bad

[DannyBWell]

I haven't kept this crypt but have had some other crypts since no one else has chimed in I will say after looking at some pictures online it does look possible for that crypt to have some wavy leaves like you have pictured.