Problem c5c firmware

Helo…When I update c5c PTP to firmware 2.9.0 I have a problem I have a problem It takes a long time to communicate with the other point sometimes stays two hours

Are both C5c radios being updated?

Are you using auto channel or power?

Are you using auto gain control? (This is where I am leaning) Try turning that off and hard setting it, IIRC this is a setting on the Master side of the PTP, but I could be wrong and thinking of PTMP settings.