VPN latency weirdness with remote teams

[Henryc]

Hey
We've got people in Europe and Asia connecting to the same internal servers. Lately, some of them get super slow response times, even small file transfers take ages. I checked the VPN logs on our OPNsense box, nothing really jumps out. The internet lines seem fine and other stuff works normal.
I've tried a few tweaks here and there but it's still hit or miss. Just wondering if this is something anyone ran into with teams spread across continents.