avast IS 2015 slow down my internet

Hello everybody

i like to watch live sport event when i am watching live stream via internet like beIN sport channels i got very low bit rate from there website like 280 kbps anyhow when i turning off all avast real time shields the problem goes away and after that i am able to watch at the highest resolution available on the website . i went to the setting and made be-IN and all the live stream website that i am using in exclusion but that did not solve the problem .

sys : windows 7 sp1 ( latest update)
avast : Avast IS 2015 up to date
internet speed : 25 Mbps

please help .

Disabling the webshield should be enough.
It is a known problem.
Many people have it.

What other security programs are you running ???
I have no problems watching live stream on beIN while leaving my protection in tact.

i do not have any other protection software and if it is known problem why avast didn’t solve it .