What is causing these brown patches on my leaves?

[NebulaHaze]

You both got it right! These weird trails are caused by leaf miners which are larvae that live inside the leaves and can come from either flies or moths/caterpillars

[9fingerleafs]

The plant has fly larvae eating the leaves from the inside ✌🏼️

[Royal Nugs]

Hmmm. Looks like a caterpillar mowing the lawn!

[NebulaHaze]

Another quiz for you all This outdoor plant is getting these brownish pale marks on some of the leaves. What's causing it?