Bizarre Leaf Patches: BRIGHT Yellow, Like a Paint Spill

Leaf with yellow patch.jpg

Recognize this? I don't.

They develop quickly (overnight) and there aren't many (maybe six patches in a big tent of plants). They usually are like this, where they only affect one side of the leaf.

I'll fill out a diagnosis form in a bit. I thought something might simply recognize this, considering it's so vivid.

TIA!

~jesse
 
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