Can you post the power levels as well for both Downstream and Upstream.
The ATOM restarting we think is due to the CPU in the Hub getting overloaded. The restart kills the processes and starts up again on a clean slate, so to speak.
You could try a 60 second pinhole factory reset as below;
Remove any ethernet cables from the Hub and hold the pinhole reset switch for 60 seconds. Do NOT reboot the Hub, just let it do it's thing. Note you will need the passwords from the bottom of the Hub afterwards, so make sure they are legible.
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