Strange RRD graph on master firewall for SYNC (traffic graph is fine)

[silent samurai]

Hey guys,

I have a small issue. I have 2 machines running on CARP (master+slave) and I had them on 1.2.3 before upgrading to 2.1.3. All went smooth but noticed one small issue: RRD graph on master for SYNC is not correct (not really sure where it gets data from) but slave is fine. Also SYNC statistics from traffic screen is ok. Tried resetting couple of times with same results. Attaching screenshots. Any ideas?

Thanks a lot,
Aldas