Nuntium is signaling MessageAdded without "Sender", and the attachment file contains "message not found". In the nuntium log we can find the following message:
2016/01/11 14:16:18 Cannot upload m-notifyresp.ind encoded file /home/phablet/.cache/nuntium/store/a53fcb01bc22bbfaa2812221d3596d0f.m-notifyresp.ind to message center: NETWORK ERROR -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to messaging-app in Ubuntu. https://bugs.launchpad.net/bugs/1532899 Title: Group chat sometimes misses messages with Unknown Number Message not found Status in Canonical System Image: Confirmed Status in messaging-app package in Ubuntu: New Bug description: This happened the last two times I received group chat messages. Several messages were not listed in the chat but rather under an Unknown Number contact with content Message no found. I see 4 such entries for the time covered in the log files. To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1532899/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp