You can probably solve it by making the floating group transparent, and then place a regular group inside it with the settings in your image. Then, instead of hiding the floating group, you hide the regular group instead.
The floating group’s height will be reduced to zero, and it should fade.
@emmanuel can u send @petter a [bubble logo] ?
That solved it! I now have a solution for floating groups too.
Both floating group and normal group animate on scroll without need for a workflow.