Bizarre: Cross filtering between TimeLine Visual and Bar Chart

[DoctorYSG]

In the model below, I have an Dimension Table (HoursTable) (hour/day/month/year) linked by a 1-Many by the hour column to a Telemetry table (Where TImeKey is the foreign key) and it is in hours).

In a BarChart I am showing the Distance vs Time (where the X-axis Time, is the Hour/Day/Month Hierarchi) from the Hour Table.

All that is working fine.

But I am also have a TimeLine (2.4.0) visual From MSFT that I am using as slicer. Funny thing. I though I should be able to set that "slicer" to use the same HourTable (with the same hierarchy) as the Bar chart. IF I do that then it seems to slice, but in fact there is no cross filtering on the page, and the bar chart does not uipdate.

Only if I specificy the TimeKey (which is part of the telemetry table) does the slicing work properly

There is something here, I want to fully understand about the internals of PowerBI not just to get it to work. And I think this shows something subtle in the data model that is underneath the system.

Anyway Pictures will make this much more clear. Here is the model, and the settings for the two visuals:

[DoctorYSG]

Let me update this so it is even more clear. I will  show you the time slicer that works (with its settings) the slicer that does not work, and the settings on the bar chart and the model.

Chart

Broken Slicer

Model

Good Slicer

[HotChilli]

"I wanted you to see the configuration of both the time slicer and the bar chart. That is the difference between top and bottom." - I'm sure this is obvious to you but it isn't obvious to me.  Can you please explain what the difference is?

[HotChilli]

"Anyway Pictures will make this much more clear." - I don't think they do.  What are we supposed to be seeing here? The top and bottom pictures look the same to me.

Also - there is an 'i' warning on the slicer.  Can you investigate that as well please.

[DoctorYSG]

I wanted you to see the configuration of both the time slicer and the bar chart. That is the difference between top and bottom.

The "I" warning is about too many TimeKey values. Not surprizing, but it does not effect the TimeLine. But again, I did not want that visual to have to use TimeKey from Telemetry, but rather the Time Hierarchy from the HourTable Dimension, there woudl be far fewer values if I could use that.