Cannot reach HA from my Tesla when connected to local wifi?

I have a weird issue, which I doubt is a router issue. Got my HA installed on a NAS with NGinx Reverse Proxy and an external domain pointed to it.
Using Home Assistant on my phone and computer works without any issues whether I am connected to my local wifi or ethernet or 5G.
Which means the connection is good wherever I connect from.

Just got a Tesla and logged in to my Home Assistant from the built browser. This worked great. Until I got home and connected to my local wifi, now it does not want to load Home Assistant at all, until I get away from the wifi.

This seems to be related to Home Assistant somehow refusing connection, not my Reverse Proxy or any other settings.

Any ideas?