2.1 double-click to enter note entry

After installing 2.1, double click to begin note entry works for a few minutes then stops working.
If I restart Dorico it works again then stops.
This is in a number of different files and a new one.

Anyone else?

All fine here. What OS version? Do you use any apps that might be using the keyboard in some way?

All fine here, MacOS High Sierra on a 2015 MacBook Pro; with or without a midi keyboard plugged in, fwiw.

Not being able to start note input by double-clicking would normally indicate a performance problem. If you find this is reproducible with a particular project, then please follow the steps I posted earlier today here and send the data so we can look into it.