Can't access some device configuration settings over Wireguard VPN

[dmmincrjr]

I have a site to site Wireguard VPN setup and for the most part it functions without issue. The one issue I have noticed is when I'm at one site and try to access a device configuration settings via a browser at another site I get a timeout error and it will not connect. As an example I was trying to modify a configuration on a Yealink phone at the main site when I was at the remote site but got a connection timeout in the browser. However I could access a configuration on a Grandstream phone at the main site from the remote site. When at the main site I can access all the device configurations via browser. I can ping the device from the remote site to the main site and get a response with no packet loss so have connectivity. It's not a big deal but sometimes frustrating and just curious what might be preventing me from accessing some device configurations via the browser?