You misunderstand; I can connect to the server (I'm in now) but the server just doesn't show up in either the arma3 (launcher) server browser or in the a3 browser.
Only ingame does the server show up in the server browser.
It doesn't show up in the launcher server browser or A3 for me; But when in arma3 itself you can find the server. I can also see it's up on here ofcourse. Very strange!
(Note; Yes I checked if any filters were on and such, but in A3 the server is favourited and still doesn't show up)