Speaker View does not display the correct Upcoming Slide #3512
Description
When I press the 'S' key on the demo site to open the Speaker View, the preview of the Upcoming Slide shows the wrong slide. In some cases it is the current slide, and in others, it is the previous slide.
Tested on Firefox 119 and Chrome 118.0.5993.118 in Windows 11.
Also tested with the instructions for Full Setup and Installing from npm as described in the Installation tutorial. The version tested in the latter is @latest, that is, 5.0.0.
4.6.0 appears to be working as intended; could this be a regression?
Issues as described in the Demo
The opening slide does not render the next slide.
Here, the gif slide is supposed to come before the background slide.