Trace is invisible on de/activating via legend #6128
Description
Steps to reproduce (use https://jsfiddle.net/5tf14onw/1/) (order is crucial!)
- I'm plotting several traces in a scatter plot.
- I double click one trace ("Hydro turbines and pumps" (call it x)) in legend to have an isolated view.
- I'm adding another trace ("Run-of-river" (call it y)).
- I deselect x.
- I deselect y. (On purpose, no trace visible now)
- I add x and deselect it immediately again and add it again
- Now I'm adding y. But it does not get displayed. Even though tooltips are shown for this trace when hovering.
