Changes in Timeline don't affect Slicer

[Bagharmin]

I have a Timeline and some Slicers connected to a pivot table. The pivot table uses data obtained via Power Query and loaded to the data model via a connection only (I'm probably not saying this entirely correctly). Whenever I change the Timeline, the changes are reflected in the pivot table, but the Slicers don't update. Whenever I make a Slicer selection, the pivot table updates, but the Timeline doesn't. I've searched online and poked around in the settings, but I can't find a way to make the Slicers reflect changes in the Timeline (short of a macro, which I don't want to use if I can help it).

Am I missing something simple here?

Many thanks.