Slicer stopped working with between style

ok, I beleive I have managed to fix it myself, but it does appear to be a bug, so I'll explain it here in case it helps others

This is the direct query I use, the slicer is on event_time_rounded, but as you can see the query also has a predicate on waitstartdate and waitenddate, which are parameters

You can see that the default values for theses parameters are more than 60 days ago i.e 01/10/2025 and 10/10/2025 and because I keep a rolling 60 days of data, those values will filter out all rows.

However on the page itself, I have more recent dates linked to these parameters

But the silcer with 'between' seems to ignore these and instead validates on the default values i.e. it expects no rows

But the rows are there.  You can see them If I change the slicer from 'between' to 'dropdown', it just doesn't show them when using 'between' 

So the fix is the change the default values to something that does return rows

and then the slicer displays correctly with 'between'

Wierd bug

Roger