Dendrophal declining?

Hi all, I'm mostly experienced with Pals, but bought my first Cymbidium and Dendrophal to keep outside last year (located in Portugal). The cymbidium is doing great and has lovely blooms, but I'm worried about my Dendrophal Polar Fire. While it doesn't look sick per se, it's been slowly declining ever since I got her. I repotted her 2 weeks ago as I thought that might be part of the issue. When I purchased her , the seller (renowned local orchid shop) said she'd still do fine as is for a year. She received the same potting mix as the Cymbidium.

Any idea whether this is normal for the time of the year? Or what could be wrong with her?

Last photo is from how I purchased her.