There is a possibility that this could be related to PAN-OS vulnerability CVE-2019-1579.
This vulnerability, which Palo Alto Networks PSIRT addressed with security advisory PAN-SA-2019-0020 was published on July 18, 2019, and affects the following PAN-OS versions:
PAN-OS 7.1.18 and earlier
PAN-OS 8.0.11-h1 and earlier
PAN-OS 8.1.2 and earlier
It is recommended that you upgrade to PAN-OS 8.1.3 or later..
If you wish to dig into this further, it is recommeneded that you open up a Support Case and provide a Tech Support file.. as core files may provide more information.
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!