Ring-Like Pattern on Catt

[DesignerofBeauty]

Hello Everyone,

I have a Cattlianthe Rojo which has developed this ring-like pattern on about half of its leaves. It's been there for some time, and it does not seem to be progressing. The pattern is also only on the top of the leaves, and not the undersides. I'm suspecting it's either a virus, or damage from cold temperatures. I'm curious to hear your input as to what might be going on.

Thanks for taking to time to help!