This version appears to be working a lot better, we are not getting all lines locking up now.
However we have noticed 1 line locking out, and we are seeing a module staying on the VG monitor after the call ends. It does not appear to be stopping future calls going out on that line.
I have attached a screen shot of both occurrences along with corresponding logs.
Also, will future versions of VG include the change you made to fix this issue or are we likely to encounter it again if we update to future releases?