About the only thing I've been able reliably to prove is that _UNLOVED seems normally to not work, whilst other styles from similar ranges normally do work, though even that isn't 100%.

Muting tracks seems to have no effect.
LatencyMonitor mostly says my PC is suitable, even when the sound is breaking up.
WiFi might be relevant as at one point I could get the break-up or not depending upon whether WiFi is or is not on, but I can no longer get it it do that.

One place I may have been misleading myself is that when changing styles, the new style doesn't always appear, so when things have appeared to be working OK, I can now not be sure that it was really playing _UNLOVED. I believe that one only needs to click a style and then [OK] to set it, but that isn't always working, particularly again with _UNLOVED ... I can generally switch away at the first attempt, but getting it to select and use _UNLOVED seems to be difficult.

Another peculiarity is that the longest reported Interrupt run-times are reportedly the Microsoft HDAudioDriver (I'm using Focusrite, not HDAudio). So I tried changing from MME to the Focusrite ASIO driver. Now it plays much better, but I'm still getting that double-click on the count-in.

I've even selected no MIDI driver and no VSTi/DXi in case there's something there causing double-clicks and break-ups, but to no avail.

I've spent most of the day going round in circles with this. For now at least, I've had enough :-(

Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
.