I’ve noticed things get stuck, like podcast stop auto-downloading on my phone, while I’m connected to zerotier. I’ve looked into it and it seems that the VPN connection is marked as “metered”, so it tries to save data.
Some other VPN products have had the same issue, see: https://github.com/Gedsh/InviZible/issues/62
Could this be done on the Zerotier side as well?