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 188.8.131.52.
In Tellus WebApps we have update TellusAPI to be compatible with Tellus Voice 184.108.40.206. This means that Tellus WebApps 220.127.116.11 must be upgraded if Tellus Voice 18.104.22.168 is installed and vice versa.