When downloading anything or running speedtest the Tx stats on all the ethernet interfaces seem to all go up almost as if it adds bridge traffic to every interfaces traffic this does not happen to upload.
Why is this happening and how to fix it?
Tried both latest stable and beta firmware.

This does not happen on HAP ac2 on 7.6
i think you must share this on current beta version thread
http://forum.mikrotik.com/t/v7-7beta-testing-is-released/161807/1
This only happens on the RB5009Upr on both stable and beta firmware, this does not happen on hap ac2
The issue seems to affect throughput also I can not get past 500Mbps download
When I removed the sfpplus port from the bridge problem went away even though Internet is on PPPOE by VLAN on the SFP.