System: Dell XPS 13 (9370)
Computer does not seem to be registering the de-click action on the touchpad, or when using a physical mouse ie when editing text a completed click with a following mouse movement has the action of selecting the text from the the initial click location to the final cursor point.
Occurs in Spyder, RStudio, and IDLE. Also seems to effect the selection of programs from the favorites tray Instead of opening, they will be highlighted and dragged. Similar or same issue as:
My current remedy is to restart computer.
Would have added this information as a comment to the linked posts, but as a new contributor, I am not able to do this and with the different versions of Ubuntu the problem is presenting in, may be (but probably not) a different issue.