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Hey @Carrera997 , thanks for coming to us with your concerns. When these 2 Contact Sensors go offline, are they unresponsive and what do you usually have to do to reconnect them?
I always recommend checking the distance to the Base Station to ensure they are well within range.
It sounds like distance and interference could be a cause for this, given how it goes offline but then automatically reconnects later. If these two Contact Sensors are well within the range of your Base Station, I recommend removing them from the zwave network and readding them. Let me know if that does the trick!