When a CustomScrollView has multiple 'slivers' that are SliverGrid (or Custom), under some circumstances the ChildBuilderDelegates are called while the entire sliver is not on screen. For example, in ...

The example app is a simple list which displays an image and the item number. On the web, the memory usage grows quickly and is not hit by the GC, not matter how long the tab is left open. The app ...