Ipsec status hangs after 30 min

[ShMw]

Greetings everyone…

I'm running Pfsense 2.4.2-RELEASE-p1 on a Super Micro C2758. I have 3 ipsec point-to-point and 1 mobile client (IKEv1) connections.

After about 30min the IPSEC status page fails to display their status. Even in I run it from the command line. The only resolution I've found so far is to issue the following command:

killall -9 charon

then after another 30min or so it hangs again.

For the record, I'm experiencing loss of connectivity on a weekly basis, and could be related to the following bug; but I'm not running BGP?! …
https://redmine.pfsense.org/issues/6223

After searching the forum it was suggested it could be some dud phase2 entries in config.xml, but after verifying mine, it was clean:
https://forum.pfsense.org/index.php?topic=99671

Oddly enough my 3 other boxes do not suffer from this issue… Not sure what to check/do next, I'm hoping someone can shed some light.

Thanks!  :)