**Important, please read before asking for generous steps to be done:**
1. Connecting to the other servers will work fine.
2. Server restart will solve the problem.
3. If the player changes IP address via VPN service (NOT the connection, only IP) - it will solve the problem for that player, he will be able to reconnect without waiting for server restart.
I do not ask to fix a crash problem for every player out there who have arma installed. I ask, as a server owner, to provide a solution which helps to prevent the battleeye kicks for player with described problem. This is a known issue which I have seen on different kinds of servers with BattleEye enabled.
It hasn't been the case forever too. It was fine over a year ago. First reports on that problem have been happening since January 2018:
https://feedback.bistudio.com/T127689#1770236 - ticket is ignored and on hold since Feb 13, even though there were information provided.
https://forums.eutw.net/viewtopic.php?f=6&t=6914&p=59502