This is a client side issue (doesn't mean other clients will have it too), reason for the issue for now unknown, If you can't connect to server through server browser try to use "direct connect":
#Arma 3 server list windows
Windows Media Player Network Sharing Service enabled (makes server joinable).If you have problem with its state reset on the interface reopen, check if all of the required for this feature services are running: DNS Client, Function Discovery Resource Publication, SSDP Discovery, UPnP Device Host (makes server accessible from internet) (maybe it is about the services and not the network discovery) Network Discovery enabled for your network type (the setting can be found in.Setup the #Port Forwarding in your firewall or\and router accordingly, also doesn't seems like implemented in some routers Port Trigger feature works with Arma 3 Server (tested with ASUS RT-N66U)."D:\Games\Arma3\A3Master\arma3server.exe" "-profiles=D:\Games\Arma3\A3Master" -port=2302 -config=CONFIG_server.cfg -world=empty.so it looks something similar to the following.-port=2302 (Required if running multiple server instances including any previous Arma 2 instances).
#Arma 3 server list install
#Arma 3 server list download
(This will download and install the required steam files to your custom steam directory)