Sidewise incompatiable with gmail when used in Chrome on Windows 10

My cursor flickers when I'm in gmail trying to type a letter. It also sometimes does not let me cut/paste words from the letter. I've isolated the issue to Sidewise. When I click on the URL box at the top of Chrome that has some URL showing, then move my mouse over sidewise which sits on the left hand side of my Chrome browser, the URL starts to flicker.

Please advise.