Client_mute drops off mesh when passing through router nodes in a triangle

[Th3H0ff]

Hi, it's me again (feels like it)
This time I'm taking my Heltec V3 with stock antenna on a bike ride from my home base through my two routers both placed on hilltops. In the woods mind you but still high up. My base and the two hilltop nodes are all some 3km apart and have connectivity to each other. A nice triangle mesh I would think.

However after leaving home my mobile Heltec stops sending location telemetry to the base when it drops connectivity to the base. I have an Owntrack setup to visualize this. Somehow it feels like the router doesn't forward packets from my mobile node. The mobile unit can traceroute to the router nodes. Do I have a though problem with my triangle or should I look for problems withing the router nodes themselves?