Jump to next or previous chapter

I might be stupid for not understanding how this works. However, this is my question.

On all my Concerts on DVD:s and Blu-rays I have copied them to MKV files and edited the file and added the namn of the track to each chapter in the file.

When using the new Siri remote with my new Apple TV 4K and touch the left or right side of the ring on the remote I will see a message like this above the timeline of the concert:
Name of track >>I
I<< Name of track

But I don’t understand how to jump forward or backward to the track being displayed.
Does anyone know how this works?

This suggestion thread should shed some light on this.

And note that the fixes are in progress. :wink: