This morning I noticed there are this weird bumps on my nepenthes. Can't scrape them off. I only found them on 3 of the 5 leaf. This chaniana sits in the middle of my other indoor plants. They sit in a rack under t5ho lights. I don't see the blisters on the chanian on its neighboring plants.
The temp in the room never gets higher than 80 or lower than 50. There's also a good amount of air circulation as the window's is open for half a day. Not sure what's going on but would appreciate your help.
Underneath the leaf.