@Gjonte, did you resolve this?
My 316GLEDs was on/off in stability for a while, so I updated to v7 in the hopes of fixing it. After that, every 316GLED have been unreachable, just like yours. I’m having a hard time trying to reset the dimmers, as all the automations would have to be redone as well. Same for my HomeKit setup.
Really hoping there is a solution soon.
Also on channel 11 on the zigbee network.