Hi - I have a dashboard using waterfall visuals that used to work dynamically (e.g. you click on a bar and that affects the other visuals on the chart on the fly) Now they only filter using page visuals
Seems to be a bug affecting others too - somoene else in my team has the exact same issue with an entirely separate dashboard
Only affecting waterfalls - other visuals working fine in this regard
I've downloaded and opened the sample pbix file you posted, then I found that you are using the custom visual “Simple Waterfall” instead of the official waterfall chart in the Power BI desktop.
Then I found that the interaction seems to be an undeveloped feature for this custom visual. I suggest you to go to the support page of this custom visual to contract the builder of this chart to submit your idea: