So I have a webview and then a floating action button that is overlying it. The FAB is supposed to open a bottom sheet with a couple of menu buttons. However, it is almost like the FAB is not there. It is visible, but when I click it, it just clicks through to the webview. It is the bottom-most item in the tree, and I have a test page where there is nothing but a column and the FAB, and it works on that test page. Those two FABs are identical, so it must be something to do with the webview. Is there something about a webview that you can't use an FAB over it?
Edit: here is the widget tree
