Vanda yellow leaves middle stem

[Sak_ikim_lol]

Problem in vanda paradise

Well, the NOID with fragrance that I was so happy few weeks ago, now after blooming has three yellow leaves at the middle of the stem. What´s wrong? Sometimes I have seen pics with this problem but only concerning to one leaf, but three?

We are having our "winter" (20º-30ºC) and with some weird rains (our raining season is from May to October). This week we had rains at night so I could suppose that it was water in the leaves axils. I´m not worry with night rains during summer, because the temperature is high in those months, but now maybe rains added with "lower" temperature, the water stayed longer during the night...

Any advice?

I have no change my growing schedule... all the other vandas are OK!

HELP!!!! Thanks

I attach a pic from year beginning where you can see at right how healthy was the plant.

Mario