Play/Pause Current Track hesitates

Play/Pause Current Track has slowed down lately. It used to run close to instantly, now it's around half a second or slightly more. I can live with it, but am checking to see if it's just me.

Perhaps it's because I recently installed Mojave. I see that the corresponding AppleScript command has also slowed down the same amount, so I imagine Keyboard Maestro is using that AppleScript under the covers for this.

Does anyone else have this problem? Thanks!