2.660 Copy/Paste of some shortcuts seems to break them

Describe the bug
I'm working a set of shortcuts for Carbide Motion. Window move/size and button clicks mostly. Part way through this I decided to reorganize and use a separate preset in addition to an app specific group.

I copied shortcuts from Default, switched presets, and pasted. None of my window move/size or move mouse and click shortcuts worked. Looking at settings they looked fine. Creating new shortcut from scratch in correct app group / preset with exactly the same settings as old broken shortcut and it works.

This is on a MacBook Pro, all triggers are keypresses.
macOS 10.14.2, BTT 2.660