I have an issue I’d appreciate some help with. On both Flint 2 & 3 running firmware version 4.9. I created a custom Wireguard client. There is an option to edit the client config, but it doesn’t allow me to edit at all. The only change required is the endpoint FQDN or IP. Anyone knows how that can be achieved? Or is it a problem at layer 8? 
If there is something in the config file that isn’t compatible with the GL way of doing things, it will fail to allow you to save. For me, it is because I add a subdomain to the DNS config to force appending that domain to lookups on the client side. I have to edit the /etc/config/wireguard file when I need to make changes. Disconnect, reconnect, should honor the change. You will just have to do this manually every time you need to update the custom config.