Slider layout displays according to Revolution slider breakpoints mentioned in settings https://prnt.sc/1vu7keq
Width/height that you set here https://prnt.sc/1vuau56 are responsible for the slider grid (some kind of guidelines because in order to properly resize content in the slider, the slider needs starting point size values in order to make the responsive calculations) and it’s not the same as the breakpoint width.
Mobile landscape displays notebook layout https://prnt.sc/1vuagik because it has 812px width and notebook layout works for the 1023 – 778px
Mobile portrait displays the mobile layout https://prnt.sc/1vuam2h
You can change slider breakpoints in the Global settings https://prnt.sc/1vuchj9
So, build slider content taking into account this system.
