Seems like there is ineed few similar bugs only effecting touchpads, after those gtk3 updates. (such as this bug https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/949414)
Seems like there is ineed few similar bugs only effecting touchpads, after those gtk3 updates. (such as this bug https:/ /bugs.launchpad .net/ubuntu/ +source/ gtk+3.0/ +bug/949414)