AC86U firmware - Client QoS breaks Guest network bandwith limitation

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Occasional Visitor
AC86U firmware
factory reset done before testing

The issue is that once you have defined a bandwidth limitation on Guest network, if you create any specific bandwidth limitation for an individual device (Qos menu, bandwidth limitation) it will break Guest rules. And even if you remove this specific bandwidth limitation, it will not make Guest network limitation to work again ...
The crazy thing is that if you activate a VPN client, then download limitation will work again (but not the upload, that's another issue ...) ...

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