<p>I couldn't find a reason after looking around, likely something is triggered at some point, in certain conditions.</p>
<p>As a workaround, I am considering to add a hard cleanup on timer to the transactions that leave too long after lifetime, with a log message to gather some useful information for troubleshooting.</p>
<p>If you can still get the output for gdb script on such transactions is still useful.</p>

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