I installed v7beta4 on RB2011 to test openvpn on UDP. Apart from openvpn, only DHCP and 10 rules in FW work.
After a random time, the router loses its connection to the VPN (once after an hour, the second time after six hours). I noticed that SNMP is responding and I was able to login from the WAN page directly. The attached screenshots that I managed to do before restarting the router. He didn't get up after the restart.
I can provide more information after the new year, as soon as I have physical access to the device. Please, let me know what I should send because I am a novice user.