@Philbert I am using Router Mode, which my BE85 directly connected to the Modem. I only found "AP mode" having this issue in this forum, correctly me if I am wrong.

I am using Internet Package from TM Unifi 500/mbps download and 100mbps upload. I can get full download/upload speed when using speedtest app to test. Speed Test App But when I used Deco app to do...