Congestion Control not working

[int1zando]

I have searched multiple web sources and was not able to find anything relevant. When trying to use the congestion control, no matter what I set it to, it always uses the maximum upload speed. the download works perfectly and limits congestion, but no matter what I do, the upload is always at maximum. For example, I have 90 Mbps upload, and I set the slider to 80% (72 Mbps), my speed test, both with router software, internet check and waveform bufferbloat test show 90+. If I set it to 50%, the same, 90 Mbps.
I have tried multiple software versions of DumaOS, currently on XR1000V2 1.1.1.30_2.1.39 and still not working. Should I try a beta version? Please help. Thanks.
Let me know any relevant information I can provide to best help with troubleshooting.

[Netduma Fraser]

Is the XR using PPPoE/VLAN by any chance? If so that is likely why, have your ISP modem/router handle it instead and it should adhere to your settings

[int1zando]

I have to sign into my ISP through PPPoE unfortunately. I only have one router connected to NBN box. I will call them see if theres any other protocol available but if not what can I do?
(Located in Australia)