Interface graphs missing data

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Debian 12 running in a VM on ProxMox 7.4-18 3 node HA cluster using iSCSI over a dfedicateed 10GB Ethernet network to an all flash storage array. We’ve got an IPSec VPN tunnel to a customer and I am seeing this on many but not all devices:

I’m seeing missing data (gaps in the graphs). Yes, some could be dropped packets via the IPSec, but I’ve found numerous examples. I don’t know the best way to see if this is network or system related. So, any advice is welcomed. Thank you!!