I was correct. Changing the DTIM period to 3 did not solve the problem. So @Clive_A, what are the next steps? This is clearly not a device issue but more of an access point issue.

@Clive_A The devices stop working entirely - there's no IP address. Forcing them to reconnect means they'll associate with the AP but won't get an IP. Rebooting the router does not help, only...

@Clive_A I meant reset as in resetting the radios by doing something like a channel change which causes the radios to restart. I don't get bad signal either, the devices are in a wall but it's high...

@Clive_A WiFi environment is fine as is signal strength and I honestly don't see how that will have any impact on IP addresses being lost and then not being handed back out. Bearing in mind, these...

Afternoon, I'm experiencing issues with my 650/655 Wall units whereby where despite having MAC assigned IP addresses, a handful of unrelated devices using 2.4Ghz will seemingly drop their IP...

Sounds like you've got the same issue as me. I'm going to have to RMA the device because I cannot have a router that routinely stops responding every hour 3 times in a row.