Errors in reporting FileVault 2 key escrow status

Contributor II

We have a smartgroup called FileVault 2 Key Valid.

The criteria is: "FileVault 2 Individual Key Validation" "is" "Valid"

We turned on "Send email notification on membership change"

Every once in a while, we get a message saying "Steve's Mac was removed" from the group. After the next checkin, we get another message saying "Steve's Mac was added" to the group.

This happens to Macs where I know with certainty that no changes were made, and the key remained escrowed the whole time.

Is this a bug in Jamf?