Hello. Thank you for a very nice product - love it! (switched from other vendor )
Search didn't give me an answer, so i'm writing here.

The backgroud: I have two gateways, all - mysensors solution, no MQTT.

• SerialGW (with radio)
• EthernetGWradio (with radio)
  and bunch of sensors on their small Arduino Nanos, with switches and relays. Everything works.

Problem:
What if one sensor got registered on both gateways, like this:

Here - orange and blue are the same switches (sensors), as it is seen from their names.

If the GW, which had first registered the switch - is now fully responsible for the switch. And if the GW is down - i can't do nothing with the switch binded to him. I need to go to find the same switch on "other gateway's" and only then - switch the switch

So the question:
How should i solve this non-redundant scheme? Is it doable with Mycontroller resources? Or should i use MQTT here (if it would help?)
Could you, please answer, or just point me to a discussion, or a manual - anything that may be helpful.

Thank you!