It looks like there's multiple causes of these symptoms, the easiest way to trigger the backspace issue is in bug: https://bugs.launchpad.net/ubuntu-keyboard/+bug/1385518 I haven't marked it as a duplicate though, as it doesn't relate to other stuck keys, which look to be a problem with touch detection lower down in the stack.
It looks like there's multiple causes of these symptoms, the easiest way to trigger the backspace issue is in bug: https:/ /bugs.launchpad .net/ubuntu- keyboard/ +bug/1385518 I haven't marked it as a duplicate though, as it doesn't relate to other stuck keys, which look to be a problem with touch detection lower down in the stack.