Semi-transparent leaves on my "Nelly Isler" orchid?

[fruitgoblin]

Hello!

New member here, happy to have found this place I repotted my two orchids yesterday, a dendrobium nobile which seems perfectly fine, and a "nelly isler" cambria which is looking off;

I am completely new to orchids and only know basics. I have tried asking a more experienced friend about this and she too couldn't figure out what's going on, so without further ado I will now share some photos and information:

- The orchids are in the brightest part of our home, a corridor with a window where 60% of our house plants are (the orchids are not in direct sun however);

- This corridor has a tiny window that connects to a bathroom where we shower, so plants can get some humidity from there;

- I live in Portugal, and currently our temperatures are around 7-10ºC (44 to 50F, google tells me)

- I have not watered the cambria in a month, and since it looks... sappy right now, the only thing I did when repotting was to clean its roots carefully with cold water, but not too cold;

- We haven't opened the window very often near the plants so they don't catch drafts, though sometimes I do open the windows to circulate the air upstairs;

More details about the photos:

Photos 1 to 7 were during repotting
Photos 8 to 10 were today

- I have gently squished the roots, bulbs, and leaves, none of them feel mushy. They are all very solid and dry to the touch;

- The roots seemed okay to me, though I did spot two to three root ends where they were darkened to black, which also did not feel mushy.

Thank you in advance for any answers & your time!