Brown spot on Bulbo

[SydneyH]

I received a Bulbophyllum hirundinis last week that I purchased. It was very healthy when I got it. Until yesterday, I had it in it's interim spot in the bathroom. Then I moved it outside to a shady spot yesterday afternoon. This morning there is a brown spot on one leaf that looks like bacterial brown spot. I swear it wasn't there yesterday, but the weather changed and this morning it was very hot already outside. Other than that one spot, the plant still looks very healthy but this is my first Bulbo. It has some new roots emerging and some healthy new leaves.

I want it to stay healthy though. Should I treat it or watch it or what? In the meantime, I've moved it back inside to it's spot in the bathroom. I've attached a photo. Sorry for the distracting bathroom wallpaper. One of these days I'll change it.

Sydney