Avoid NPE when recording channel close events - EUCA-9016

EUCA-9016
Ensure NetworkGroup is up to date for extant check - EUCA-9050

EUCA-9050
Merge remote-tracking branch 'origin/dev/sjones/EUCA-9016' into testing
Merge remote-tracking branch 'origin/dev/sjones/EUCA-9050' into testing