Hi, Sometimes it can be spots from water splashing up on the leaves. Or a calcium deficiency can give some rust colored spots, but I think we'd see more leaves affected. Certain bugs can leave those dead spots, somewhat like a trail. When i zoom in i see some small yellowish/ white specks on several leaves that do look similarly to thrips or some other tiny insect. Any chace you could get a few more photos closer up of the leaves? Zoom in as much as you can but still keep the leaf fingers in focus. The spotted leaves and the top 2.