OpenVPN client disconnects every 30sec

I have tried Router OS 7.4 and 6.96 and both do the same

Exactly as described above I the tik setup as an OpenVPN client and it connects perfectly and I can ping etc thru it
Then 30 seconds later it will disconnect take 2-3 to re-establish and the cycle goes on and on

Log just says it dosconnected
ovpn-out1: terminating… - peer disconnected

Then you get the connecting sequence log entries
ovpn-out1: connecting…
ovpn-out1: using encoding - AES-128-CBC/SHA1
ovpn-out1: connected

Any hints?