Throttling with Embertone Section strings

Win 7, i7 2600K, no other programs running, and for some reason a string orchestra project in Dorico throttles with Embertone section strings. I even set my buffer on the highest value possible to no avail.
Any suggestions?

My file:
My BETA Embertone expression map:

Can you please describe what you mean by “throttles”? Are you saying that you are experiencing high CPU usage, or something else? Can you do Help > Create Diagnostic Report and attach the resulting zip file?