Latency spikes every 10 minutes on router

My employer is using the zscaler client on our devices. I’ve noticed something peculiar when we log in to the client in the morning. About every 10 minutes or so there are latency spikes on our network. This is repeatable and we can make it go away by logging out of the zscaler client. Attached are some examples.

Here are a couple photos of my firewall’s (pfsense) gateway monitor showing the spikes

Here is ping plotter running and showing the aftermath of those spikes

Has anyone dealt with this before? It’s causing issues with VOIP calls when these spikes occur.

I have more pictures but I’m limited to two at the moment. Thanks!