@sander_hudson Interesting to see this happening on multiple APs, Since this is happening frequently, If the APs are connected to Meraki switches, Can you take a packet capture on the switchport where the APs are connected and check what is happening between the AP and the gateway during that time?
You might want to use the APs mac address as the filter to avoid all other broadcast traffic from filling out the capture. Filter: ether host x<AP mac address>.
Also, I have seen similar instances happening when the APs are trying to upgrade their firmware and failing. Worth opening a case with Meraki support and confirm there are no issues with a firmware upgrade or something like that.
Cheers!
Raj
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