I couldn't reproduce this yesterday with core snap 1512 which does have the network-bind plug. So maybe that fixed it. It was added in https://github.com/snapcore/core/commit/6de4becf8a3f7af69f665b7452a93a97a50c0547 which has the commit message 'add network-bind to core-support as it appears to be required on the "Boundary Devices Nitrogen"', so if it fixed this bug I'm pretty sure it was by accident.
I couldn't reproduce this yesterday with core snap 1512 which does have the network-bind plug. So maybe that fixed it. It was added in https:/ /github. com/snapcore/ core/commit/ 6de4becf8a3f7af 69f665b7452a93a 97a50c0547 which has the commit message 'add network-bind to core-support as it appears to be required on the "Boundary Devices Nitrogen"', so if it fixed this bug I'm pretty sure it was by accident.