Hi there!
I find very often that when using a custom profile from Flightsim.to at a custom airport, when I ask for boarding, I do not see PAX actually boarding the plane.
To explain it better, I am not prompted for boarding the crew, then I hear the ambiance sounds of PAX boarding for a few seconds, then the sound stops, and that's it. COUTL keeps running fine, because I will get the plane refueled, baggage is loaded, etc.
This happens for example at LVFR LEBL (tried many different gates) but also at other airports, such as FSDT LFSB. The only thing they have in common is that for all of them I use custom profiles downloaded from Flightsim.to.
All the other GSX features work fine: Refueling, baggage loading, pushback, etc.
Also, when I arrive at one of the gates where I previously did not see PAX boarding, deboarding works fine (I see people leaving the plane and walking through the jetway).
This happens approximately at half the custom airports I have tried.
It is not a deal breaker, but it would be nice the have that fixed.