It’s not even necessarily stretching to much, you just filled the pot to high starting off(I start in solos filled up to about 2” from the brim then bury the stalk once they pop and stretch.) if you can you should move it to something else, that rubbers gonna get hot, and doesn’t breathe your roots are not gonna be happy in there. It’s small enough that you should be able to move it pretty easy. Go spend $5 on a pot or fabric grow bag.