Thanks @Ryan_Miles I saw these in the event log that support your statement:
![Screenshot_20210916-073851_Chrome.jpg Screenshot_20210916-073851_Chrome.jpg](https://community.meraki.com/t5/image/serverpage/image-id/20157i30C6C9EB2431016C/image-size/medium?v=v2&px=400)
However the sensor can see four APs that are all MR42s running 28.4 and one of them has a -67dBm signal
![Screenshot_20210916-074054_Chrome.jpg Screenshot_20210916-074054_Chrome.jpg](https://community.meraki.com/t5/image/serverpage/image-id/20158iEF1D6BA0091E9179/image-size/medium?v=v2&px=400)
So far I've tried rebooting the MT, multiple of the MRs, making sure Bluetooth is on and am now a bit stuck!
If my answer solves your problem please click Accept as Solution so others can benefit from it.