Every year it’s a new infestation…this time I can’t ID the culprit – got any ideas?

I’ve been running a little rooftop garden just a few blocks from a big city park, and it feels like each season comes with its own “pest of the year.” Two years ago, I fought off an aphid takeover that I suspect the wind carried over from the park. Last year it was snails that hitchhiked in with some new shrubs that I bought.

This summer, leafhoppers showed up in droves (never had them before) —but I’ve also discovered another mystery pest that’s been chewing through my leaves (photo attached). I can’t figure out what it is, and it’s eating fast. I noticed it eats lower leaves on the shrub, not higher ones, but that may be because they're newer/fresher leaves.

Has anyone run into something like this before?

Thanks in advance!