Not passing context to Tooltip page

I have this matrix, the set up looks like this.

And the final report looks like this. For each employee, there is a category of event type, and within each of those, there is a bar for each month.

I built a tooltip page that looks like this.

The issue is that, when I hover over, for example, "Team A / John Doe / Time logged (hours) / the first month bar", like this

the tooltip filters to only display Employee: John Doe and Event type: Time Logged (hours), but then displays all the months in the dataset. If I go to another employee or event type, the tooltip changes and displays only that employee/event type. But every month in the dataset is displayed always.

So no matter what month bar I hover over it shows:

Emplyee Name              MonthBeginDate              Event Type
John Doe                       1/1/2026                          Time logged
John Doe                       2/1/2026                          Time logged
John Doe                       3/1/2026                          Time logged
John Doe                       4/1/2026 etc

If I move to another Employee/Event Type it shows

Emplyee Name              MonthBeginDate              Event Type
Jane Doe                       1/1/2026                          Inbasket messages
Jane Doe                       2/1/2026                          Inbasket messages
Jane Doe                       3/1/2026                          Inbasket messages
Jane Doe                       4/1/2026 etc

I don't understand why it's passing the "hover context" for all the fields except one. Event type is a column like month. Is it something to do with it being a date?  I'm guessing because there's a range of dates in that window, the entire range is the context?

Is there any way around this?  It makes having a tooltip basically useless if there are dates invovled.