bvbfan
I have two monitors, and my cursor disappeared while moving from my primary to secondary monitor. Switching from Wayland to X11 fixed it for me. Upstream bug is almost certain to be resolved by RC2.
Also fixed by moving to x11 was my Oxygen Yellow cursor. I am less certain that will be resolved.
Others who might have Plasma5-only widgets (plasmoids) might find them not to work. All mine work, but I just grab them by right-clicking on my desktop and adding widgets from the default set.