I'm running Start11 on a Surface Pro 8 with the taskbar at the top of the screen. After that Windows update broke the taskbar, I started running the beta version which seemed to fix my problem. Last night (on 18.104.22.168), sometime after removing the keyboard, my taskbar reverted to a touch-friendly hidden taskbar at the bottom of the screen, even though I've never used either the hidden or touch-friendly options in Windows. I tried turning Start11 off/on, checking the windows options, etc., with no success. I ended up doing an uninstall/reinstall. I've gone through several iterations of on/off, uninstall/reinstall, going through all the options, etc.
I'm now on 22.214.171.124, and the only thing I can say for sure is that the hidden touch-friendly taskbar on the bottom of the screen will return. It may happen immediately after install, after a reboot, after removing the keyboard, but it will happen at some point. Once it happens, the only way to (maybe) restore proper operation is to uninstall/reinstall.