Pfsense 2.3 HA hangs after about a week

[pama]

Good morning mates,
I have succesfully upgraded my pfsense HA installation.
One is a vm under VMWare 6
One is a physical host (DL360 G4)
When I was in Pfsense 2.2.6, everything worked like a charm.
Now in 2.3 after about one week of working, the vm (HA master) hangs (no vmware errors, no pfsense logs) and I have to shut down and restart twice.
After that, and after some secondary/master changes, the cluster become functional again for a week.

Any suggestions before downgrading to 2.26?

Thank you

[jimp]

Are you using IPsec?

The only hang I can think of that might be relevant is https://redmine.pfsense.org/issues/6296

[pama]

Yes, I do!
Thanks for the suggestion, hope for a quick resolution!