Slideshow not working in fullscreen mode

[acwolff]

I have a function to start the slide show via a button at the thumbnails page at the first slide, see
https://codepen.io/acwolff/pen/ZqaXrB?editors=1010

This works sometimes the first time, if I close in that case the light-box and start the slide show again via the same button, the slide show hangs.
However if I change

  fullScreen : {
	  autoStart : true,
	},

into

  fullScreen : {
	  autoStart : false,
	},

then here are no problems.

Is this a bug or do I something wrong?

Some details:

It works correctly on Android, iPad and on a PC with Edge.

It is not working correctly on a PC with FireFox and Chrome. However if I start with the thumbnails page in Fullscreen mode (F11) there are no problems.

[acwolff]

Pen updated for version 3.5.7:

https://codepen.io/acwolff/pen/EBYWWX?editors=1010

and here with another first image:

https://codepen.io/acwolff/pen/LKErmJ?editors=1010