According to Google, the Home Mini behaved as if the top touch control mechanism was constantly activated, which led the search giant to disable top touch functionality. (androidauthority.com)
«We have made the decision to permanently remove all top touch functionality on the Google Home Mini. (businessinsider.com)
Google has rolled out an update to all Google Home Mini devices (currently in the hands on reviewers) that removes the top touch functionality of the device. (pocket-lint.com)