Hi, What idea about an error:

Disconnected (check URL or network). Check that the backend URL is correct and the backend server is reachable. If the backend is on another origin, check that it allows this frontend origin.

on Canvas site when be back from another tab (selfhost k8s)?

can you give explicit reproduction instructions for this? what's your helm config? what's the browser navigation flow?

I solved, it was Persistance volume problem thx.