Cannot use LG Magic remote with Roku Ultra

Hi there,

I bought a Roku Ultra 4850R (says on the box), 4850X (says on the bottom of the device).

I have an LG OLED 65B1 with a Magic Remote.

The LG remote cannot control the Roku via CEC no matter what I tried. It only works in direct IR sight to the Roku.

Troubleshooting:

Restarting both devices, enabling and disablig SimpliLink (CEC) on the tv, deleted the Universal Control Settings and went through the process by selecting the automatically discovered OTT device called "Roku", manually selected OTT, searched for roku then tried manually entering the device code -> all 3 available options: 4850R, 4850X, 4850RW; manually selected Set Top Box and Roku, selected the Roku Advanced Settings -> Network permissions -> Allowed or Permissive.

The HDMI cable used is the one found in the Roku Box.
CEC setup doesn't work from the Roku Remote settings either -> the music doesn't stop. IR set-up works.

What other options can I try?