Receive Byte Data is zero.

Thank-you for your responses to my other topics.
I have AW Traffic Monitor connected to a hub (bypass mode) between a router (i.e. Meraki mini) and an AP (Wireless Access Point).
Wireless clients are working Ok but "send byte"and "receive byte" data are not being recorded.
"Send byte" only captures some packets and "Receive byte" is stuck on 0.
What is happening?
I have AW Traffic Monitor connected to a hub (bypass mode) between a router (i.e. Meraki mini) and an AP (Wireless Access Point).
Wireless clients are working Ok but "send byte"and "receive byte" data are not being recorded.
"Send byte" only captures some packets and "Receive byte" is stuck on 0.
What is happening?