Finder keeps opening new tabs

This is a long-running bug that Apple have been unable to fix. Still exists even on latest Remote Desktop 3.9.

To recreate the bug, in RD highlight some text say in Terminal or Safari or wherever, and press command+c. Now double click a folder and it opens in a tab. If it doesn't happen then copy some text again and it'll happen the second time.

I found that performing a two-finger right click with the MacBook Pro trackpad temporarily relieves the stuck command key. Neither a mouse right-click or an option click provide the same fix.

Another bug is you cannot hold option and double click the Photos app to launch in select photo library mode. Or iTunes either. The only way to do this on a local keyboard. I think this could be related.