OK so I may have a workaround that gets me closer. Its not perfect... but...
I added a record picker next to the grid view below, so that when you click the added button in timeline record it loads the same interface but with the record picker adjusted to that record.
Interestingly... if no filters are applied, it doesn't even refresh the page and just directly changes the record picker, even retaining the popup window and spot im at in the timeline view.
however if there is any filters applied to the timeline view, those get lost and the view actually refreshes.
Is there a way to get the browser URL via a button action before changing the record picker? that would resolve this by allowing me to capture all the filters currently applied to timeline view and then refresh page with same filters applied but adding the adjustment to the record picker.