<p></p>
<p>Besides providing the data requested in previous comment (which would be still useful for troubleshooting) try to run current master or 5.3 with the next commits backported:</p>
<ul>
<li><a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/kamailio/kamailio/commit/a4f8c0291bfd32752c0c2c323f618c6ac0c91d53/hovercard" href="https://github.com/kamailio/kamailio/commit/a4f8c0291bfd32752c0c2c323f618c6ac0c91d53"><tt>a4f8c02</tt></a></li>
<li><a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/kamailio/kamailio/commit/125031daeade9dab5c36b912dda65700d95c4c6a/hovercard" href="https://github.com/kamailio/kamailio/commit/125031daeade9dab5c36b912dda65700d95c4c6a"><tt>125031d</tt></a></li>
<li><a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/kamailio/kamailio/commit/8965ff07f2e9fa105fc56896eed9caf4b6faf261/hovercard" href="https://github.com/kamailio/kamailio/commit/8965ff07f2e9fa105fc56896eed9caf4b6faf261"><tt>8965ff0</tt></a></li>
</ul>

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