That's a common problem when using OTR with the same account in a multi-device environment. It is fixed by the introduction of instance tags in libotr 4.x [0].

That's a common problem when using OTR with the same account in a multi-device environment. It is fixed by the introduction of instance tags in libotr 4.x [0]. You should check the versions of libotr used by all your clients - if they are all libotr 4.0+, you shouldn't have these problems. [0] https://otr.cypherpunks.ca/UPGRADING-libotr-4.1.0.txt https://otr.cypherpunks.ca/UPGRADING-libotr-4.1.0.txt A simple workaround is to use a different account for each device (e.g. me@jabber.com, me+mobile@jabber.com). TextSecure's developers recognize that a good multi-device experience is essential to provide a comparable experience to other messaging apps. Their approach is different from OTR's, and is described here [0]. [0] https://moderncrypto.org/mail-archive/messaging/2014/001022.html https://moderncrypto.org/mail-archive/messaging/2014/001022....