Howera Lava Burst "Pacific Sunrise" spots on its leaves

[Heatherandorchids]

Hi, All.
I picked this orchid up a couple of months ago at an orchid show and it was doing pretty well adjusting to its new location, and even is showing a new pseudobulb! Then, about 4 weeks ago I noticed a couple of small transparent-ish spots on one of the leaves. In the last week the number of spots have exploded.

It has been sitting in a bright, open room with some direct sun and regular watering. I had been misting the leaves occasionally in addition to watering the medium weekly, but have stopped misting.

I am posting photos both from above and from below (to see the damage more easily).

I have isolated the plant and used isopropyl alcohol to wipe off the leaves, but I'm not sure what direction to go next. My thoughts were maybe spider mites? Or a disease? Or water damage? I'm lost.

Any help would be greatly appreciated! Thank you!

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