Hi,
I am using the WaterfallGrid to layout thumbnails of different aspect ratios. The data (including the JPEG data for the thumbnail images) comes from a local database (using GRDB). But it is read synchronously on the main thread, and the order (and content) of the displayed items does not change.
However the layout does. Sometimes it displays correctly, sometimes it does not (thumbnails overlap). See attached video where I switch back and forth between tabs of the app (not an actual TabView, the tab content is recreated from scratch each time).

The following error/warning shows up in the Xcode console when the thumbnails end up overlapping, but not when the layout works correctly:

Bound preference ElementPreferenceKey tried to update multiple times per frame.

Any idea what is causing this, and how I could fix it?

Btw, as you can see in the video, the layout always animates on initial display. Is that by design? And can that be disabled, ideally without disabling animations during changes?