<p></p>
<p>Can you try with couple of variants to try to isolate the cause? Try each one independent of the other.</p>
<ol>
<li>
<p>use <code>modparam("dmq", "num_workers", 1)</code></p>
</li>
<li>
<p>use <code>modparam("dmq", "worker_usleep", 1000)</code></p>
</li>
<li>
<p>use <code>modparam("dialog", "track_cseq_updates", 1)</code> - this may break authentication done with <code>uac</code> module, but I understood you test and can reproduce it in the lab</p>
</li>
</ol>

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