I tried to replicate issue but I always received presence unavailable packet when my connection was broken (even after resource conflict as mentioned). I looked into code to see in what situation I may not receive presence unavailable when connection is broken - I found that it may happen only if particular connection never sent initial presence (except from cases when exception might be thrown during processing - but no exception appeared in log).

After that I checked attached logs once again looking for initial presence being sent from client (and processed by @sess-man@) between resource conflict (binding on second connection) and time when client connection was broken but I could not found initial presence in this period of time, so Tigase XMPP Server could not sent presence as it never received initial presence on second connection.

Problem could not be replicated.