Sorry for late.. Attached log file contains the following use case: contacts 39380 and 39348 send me messages in same group (encrypted) and private messages (plain text).. It seems it happens only in one group atm (not sure anyway..); maybe some group partecipant could force encryption in entire group? (group is plenty of devices: iphones, android, windoze phone ) EDIT (maybe a work-around): try to ask to all contacts sending encrypted messages in group chats, to send you private messages until you see at least one (first ones may be encrypted and not displayed); it seems this way server stores information that we cannot receive encrypted messages and you will start to receive plain-text again from those contacts in groups I don't know how much time this will last, until clients start again to send encrypted messages... I'll let you know...