Copy page zoom bug

I’ve noticed a repeating bug that happens on all web sites after I copy text then use the mouse wheel to scroll, it zooms in and out as if I’m holding the control button.

To make this happen I highlight text with the mouse
I use the right mouse button to bring up the menu and click copy
Then if I roll the mouse wheel it starts zooming instead of scrolling
One left click anywhere on the page and it stops zooming and goes back to scrolling

It doesn’t happen if I use control-c to copy the text

I’m using Version 0.66.73 Chromium: 75.0.3770.38 (Official Build) dev (64-bit)
I’m running Ubuntu Linux 18.04.2 LTS