Proton Linux app split tunneling does not function properly

Hardware: Proxmox with Ubuntu XFCE VM

Split tunneling does not function properly. I can confirm that with split tunneling using the “include” option and selecting Firefox that Firefox does indeed show my VPN IP and curl ifconfig.me shows my real public IP. However, the machine is completely unreachable on the local lan when connected to the VPN. Disabling the VPN allows me to connect to the machine. So somehow the VPN is still forcing traffic through the tunnel even though I have selected the include option