I tried the solution in #5. I don't know if it works yet, but I noticed that "disable-while-typing" was off in dconf-editor but on in the touchpad settings, until I turned it off and on again in the touchpad settings.
I tried the solution in #5. I don't know if it works yet, but I noticed that "disable- while-typing" was off in dconf-editor but on in the touchpad settings, until I turned it off and on again in the touchpad settings.