Regression caused by Windows Preview Update KB5074105 – Komplete Kontrol S88 MK2 Mixer Metering in C

I would like to report a confirmed regression affecting Komplete Kontrol S88 MK2 in combination with Cubase on Windows.

Hardware

Komplete Kontrol S88 MK2

Software / OS

Windows 11 Pro (25H2)
Cubase Pro 12 / 13 / 14 (same behavior)
Komplete Kontrol (current version)

Problem description

After installing the Windows Preview Update KB5074105 (2026-01), the mixer meters on the S88 display in Cubase no longer update in parallel.
Instead, the level meters update sequentially / round-robin (left/right per channel, channel by channel), resulting in visibly unstable and incorrect metering.

Important observations:

The issue occurs in Cubase only
The same S88 works correctly in Maschine on the same system
The same S88 works correctly on another system with Windows 10 + Cubase Pro 12
Hardware is fully functional (display, controls, MIDI)
Reinstalling Cubase and NI software did not resolve the issue

Confirmed root cause

Uninstalling Windows Update KB5074105 immediately restores correct mixer metering behavior on the S88 in Cubase.

This strongly indicates a regression introduced by the Windows preview update, likely related to HID / scheduling / timing behavior affecting DAW-to-controller feedback.

Current workaround

KB5074105 uninstalled
Windows preview updates blocked via Group Policy

Purpose of this report

I am reporting this for:

compatibility tracking
internal reproduction
possible escalation to Microsoft

Best regards

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Komplete Kontrol Keyboards

Comments

Jeremy_NI

Hey @joggr Any chance you could make a short video showcasing the issue? This way it'll be easier for us to show this around to colleagues and devs.

Vocalpoint

@joggr

Also any chance you can tell us why you would install "previews" to a working DAW in the first place?

"Previews" are labelled as such for a reason. These are known to be shaky and are not required for normal operations.

This one in particular has had a number of issues strapped around it and is best avoided.

Most if not all of these issues will be addressed in the official Patch Tuesday release later today.

mykejb

I kinda like other people installing previews. First comprehensive bug reports like the one @joggr took the time to create are probably really helpful to the devs if the problem does continue onto the release version. Second, it means I don't make the mistake of installing that update 😀

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