I made an app with WAB and used the dashboard theme.
I chose 3 widgets - layer list, bookmark and info-graphics.
on mobile view - i can only see the first widget as it should be. The other widgets are shown as blank.
you can see the app here:
you can change the size of your browser window to be small like a mobile device (don't need to actually use your mobile).
I tried it on 3 different apps and it happens every time.
p.s - I also tried making the app using the WAB for developers, on my server, but there is no change. (v2.5 and also v2.6)
I am having issue with the Dashboard Theme as well. When opening the url link on the mobile phone(IPhone), it centers the screen in others areas, sometimes hundreds of miles away. Also, the info summary widget is greyed out on half of the layers. After refreshing the safari browser several times, it will return to normal, but will always go back to being messed up after another browser refresh. Any updates on a fix, or bug for this??