Something strange sometimes happens when I'm working on my 2016 MBP 13-inch w/ Touch Bar (Mac OS 10.13.4). I don't know exactly why, but occasionally certain gestures (i.e. pinch to zoom in and zoom out, force touch over a word to open the dictionary) simply stop functioning until I lock and unlock the laptop. Other gestures (mission control, move across desktops) keep working. This happens to all the apps I try to use (Safari, Word, Pages, Ulysses, Mind Node and so on). I can still use keyboard shortcuts to perform those actions.
As I said, the only solution I could find is to lock and unlock the laptop or just reboot it, but I would like to know if there is a better, permanent fix to this issue.