The app doesn't survive a connection / disconnection cycle

[mbof]

Repro steps

1. Connect
2. Read waypoints
3. Disconnect
4. Reconnect
5. Read waypoints

Observed:

• Occasionally at 4: fails with devicemgr.service.ts:66 Error while connecting: NetworkError: The device has been lost.
• Occasionally after 5: fails with

  Wrote command "#CEPSR\t00\t74\r\n"
  configprotocol.ts:78 Received line @#CMDOK
  native.ts:91 ERROR Error: Invalid message @#CMDOK

Expected: correct connection, no errors.