BOGUS "DoS Attack: Ping Sweep"

[duckware]

My main router is a R7800.  I am testing a second R7800 on the same network (in router mode).  Both on latest .44 firmware.

The second R7800 is complaining about "DoS Attack: Ping Sweep"'s coming from the primary R7800 WAN ip address!

[duckware]

The main router is also complaining that a Ring camera in the nextwork at the exact same moment is also "DoS Attack: Ping Sweep".  WireShark shows that is NOT the case.

Either "DoS Attack: Ping Sweep" is real -- and that means Netgear's own routers are initiating a DoS attack. or "DoS Attack: Ping Sweep" is bogus, meaning that the DoS warning is a false alarm.  No matter how you look at it, Netgear is in trouble.