Stennoglottis macloughlinii problems

[SaraJean]

I seem to be having some leaf issues with my Stenoglottis macloughlinii (woodii). I have been keeping this outdoors in fairly bright light, high in the pergola, under a 50% shade cloth. Lately, days have been in the 90’s F, nights about 77F-80F, with humidity between 60% and 90%. I’ve attached pics of the top and underside of uthe leaves. I couldn’t find any evidence of bugs (at least currently) when I checked with my loupe and also a gentle wipe of an alcohol soaked q-tip. The dots on the underside look like dirt or bugs but the spots don’t come off and are actual blemishes in the leaf.

So any one have any ideas? Too hot? Too much sun? Edema marks from being too wet? I has been getting watered every other day since the the beginning of May when it started to heat up. Was watered every 4-5 days before that when it started to send out new growth. It’s potted in a small clay pot with crumbled tree fern and sponge rock. There are currently 6 spikes on it, so it’s not too unhappy, but I would like to figure out the cause of these leaf problems. It almost looks like it’s trying to go deciduous already.

Edit. Spelling in title is wrong