Artur, I'm assigning this task to you as you were experiencing this issue (crashes of an application).

They were caused by the concurrent use of a prepared statement from many threads. I was expecting that it may be problematic but as it was not causing issues (I was not aware that it was) I scheduled a task #6110 to fix this issue to version 2.1. However, as I was looking into application crashes I've found that I need to take care of this in version 2.0, so I've done task #6110 in version 2.0 to fix this issue.

I will release a new build 15 with these changes later today, so please check if this solves the issue for you.

2x crash in row. It happened when all my accounts (10) where still connecting and I opened MUC chat.

%kobit There is no info about any crashes for build no. 15, so I need to wait to see if I will receive them as without crash logs I cannot do anything. Either way, it is rather not connected to crashes which happened before.

Indeed, however, I am sure I had quite a few yesterday. However, I cannot replicate the problem today. Will continue to test, closing the ticket now.