When I repeatedly drag an image from side to side in the Development module zoomed in at 100%, image sometimes kind of jumps back as if my mouse was suddenly moved back. This doesn't happen if I move a box in the Navigator window, and this started after the last update.
Good questions. Latest Windows 10 May 2020 release, version 10.0.19041.329, standard mouse. I tested my mouse for any sticky buttons, but it has none. And I am positive this began only after the latest LR update. I also have updated my NVidia drivers to the latest version. Youtube link attached. You can me dragging the image from left to right and back, and that image "jumps" back several times.