Shift Left-Click Crash in Chrome

A shift with a left click to color the right side graphic display will crash Chrome on a 6 yr old iMac running OSX 7. See attached image of the result. This error is repeatable on my machine. It’s a little thing. I work quickly with one hand on the keyboard and another on the mouse, going up and down the cube and hitting the shift key to check my coloring work. Sometimes I don’t let up on the shift key and when I click to color the following “Aww Snap” screen appears and I lose the work and have to re-enter Eyewire again. I couldn’t find any other report about this, is it a quick fix to filter out the shift key on a left mouse click? Thanks for your consideration, I enjoy helping you in your quest to make graphics of cells!