Selecting multiple items with "Cmd" activates zoom

When I attempt to select multiple non-adjacent notes using the command key on mac os 10.14.6 (Mojave) I somehow activate zooming out and also end up highlighting unintended notes. I am using Dorico 3.1.10 but the problem has been happening for many months and isn’t limited to only the latest version. I don’t think I set any custom shortcuts that might be interfering, either in Dorico or other software. Has anybody else had this problem and discovered a solution?

Are you using a mouse or a trackpad? I note that if I use Cmd and two fingers on my trackpad, it’ll zoom, but if I use one finger this isn’t an issue.

Yes, I use a trackpad, too, and using only one finger solves the problem. Thank you!