I don't believe this is normal?

The car is a 2014 Trax. I am 3rd owner or so, but overall the AC system appears to have had little service, all parts appearing OEM vintage or at least on there for some time. The system was charged and will hold a charge, not open to atmosphere for any length of time that I've owned it (since March). I was trying to diagnose poor cooling performance and came across this concerning issue and wanted to get some input before going further.
Thanks!