I wanted to repost this here since I haven't seen any MS response in the HA/DR forum. We backup using vss on the passive node CCR cluster. Ever since we installed sp3 we are getting 214 event log errors on the active node and logs are not truncating when taking a full.
This doesn't appear to be related to the backup software in any way as I can reproduce the issue with vshadow and others have reported it with dpm (we are using appassure replay).
Here is the original post.
Backing up from the active node works fine and this is what we are doing until we can find a resolution to the problem. Thanks