I have an Honor phone (not rooted) and I dislike the default launcher, so I installed a new one. It worked, but even after switching the default in the settings, the settings kept changing themselves after a while to return to the default launcher. This happened with both Foss-ify's Launcher and Kiss Launcher, so it doesn't seem to be due to a failure of the selected launcher.

Next thing I intended to try was force stop Honor Home, but I'm a bit worried about doing that, because what if the phone still starts refusing to launch the installed launcher but can't find the old one either and doesn't launch anything? Will I find myself unable to open any apps (including the settings to revert this) if that happens?