We found an issue regarding changing status of voicemail message. This problem only occurred when a large number of messages is stored.
We have fixed this problem in Tellus Voice with version 18.104.22.168.
In Tellus WebApps we have update TellusAPI to be compatible with Tellus Voice 22.214.171.124. This means that Tellus WebApps 126.96.36.199 must be upgraded if Tellus Voice 188.8.131.52 is installed and vice versa.