@Bromo While it mostly impacts my iot devices (pi, esp32, shark vacuum etc) I also have guest network that is restricted to 2.4GHz and this is impacted as well.

I've disabled the pmf as outlined above and I'll see how it goes over the next few days. Is there a known issue with the pmf firmware implementation?

I have the same issue on a single 670. Every few days the access point ssid is visible but nothing can connect to 2.4GHz. Probably just going to return the device as it didn't seem like there is a...