quick check, the problematic router did not have QOS enabled right when you did the speedtest?

disable the QOS and give it a try again if its enabled.

Else, forget what i am said above.


**ok, saw it in in your previous post that mentioned QoS is not enabled.**

2nd comment: unfortunately most likely this is their firmware issue and i doubt dlink will gonna releasea a new firmware to patch this for malaysia.
I would suggest you try to flash with DD-WRT and setup the vlan500 for unifi PPPoE dialup

DD-WRT

This post has been edited by KyEap: Aug 4 2020, 09:22 PM