V Thailand beauty 'Carmela' sudden yellow leaves

[Florida Realtor Paul]

Hi all,
My vanda hanging outside suddenly has two leaves that turned yellow, then quickly to brown from tip inwards.
The rest of the plant looks great. Do I need to be alarmed? A few weeks ago, I fell asleep early and forgot to pull her in on a cold snap, but she otherwise seems fine.
I am in SWfl. Ft Myers area.

[estación seca]

Cold damage in Vandas usually shows up immediately, the next day. Any chance it got too much sun? The sun is lowest this time of year and penetrates farther into south-facing nooks and crannies.

[Florida Realtor Paul]

It just seems the two leaves on one side of plant. I have been working the plant into the sun since October. It's been in same location for about 6 weeks now....right through solstice.