BBR transmits too aggressively under throttled network

[keytouch]

Describe the bug
With normal ISP broadband with 30Mbps up, speedtest utilize about 70Mbps with BBR. While effective bandwidth is of course within 30Mbps.
Aggressive transmiting behaviour might lead to latency increase and jitters... Maybe there is something odd with congestion window detection.

To Reproduce
Just run hysteria-linux-amd64-avx speedtest
To mitigate the issue, I have to lower maxStreamReceiveWindow or use brutal, which is not even a work around.
I am using 2.5.0.

Expected behavior
Transmit rate should not shoot much beyond 30Mbps.

[its0ka]

woah, really, it transmits at 38mbit/s to my 20mbit/s network, everything else on the network just dies