SQL2012 SP2 CU1 Availability Group database not synchronizing after applying February Microsoft patches

Hi,

We are starting our monthly patching and have a situation with SQL2012 SP2 CU1 Availability Groups databases not synchronizing after patching the secondary replica. This seems a little likehttp://support2.microsoft.com/kb/3033492/en-us which was for CU3 and CU4 builds. The dashboard on the Primary shows the secondary as not synchronizing. The errorlogs on both nodes show the connection has recovered but the dashboard shows critical errors. This is running on Windows 2012.

Thanks

Chris