Solver configuration error when using connection labels

Hi all,

I am simulating a thermal system in Simscape. All the components are connected in the same network either by orange (thermal) lines or by connection labels (which is just a GoTo/From in Simscape from my understanding).

When I try to run the model, it tells me that I am missing solver configuration blocks. I have tried with just two components and I get the same error when I use connection labels to connect two networks.

The question is: is this a normal and expected behavior (as it allows to split networks even if they are connected and select different solvers) or is it a bug?