Probably an app is running out of memory (over 70 to 80 MB’s), that causes “unreachable” issues here. Check Insights for every app’s memory usage.
This was with a 512MB Homey (when the RAM is fully used, it starts to swap to disk. Not recommended, but Homey still keeps functioning (but slower) ):
https://community.homey.app/t/how-much-can-a-512mb-pro-handle/49687
I think this flow & virtual device might be interesting to you:
https://community.homey.app/t/share-your-device-advanced-virtual-devices-from-device-capabilities/68676/12
