Can confirm: clicking mirrors registers as a drag in Chrome 62.0.3202.94 under every circumstance I can find.
Works fine on 63.0.3239.84 / macOS.
Chrome 62.0.3202.94 on Ubuntu 16.04 works fine for me.
Yup, I was using chrome and was totally lost.
happens in chrome as well.
Not always. Seems like under some conditions Chrome is interpreting it as a drag no matter what I do. Seems to depend on the window size, or maybe what monitor I have it on...