Intermittent USB keyboard/mouse disconnects across multiple Windows PCs (HKS0402A1U/HKS202-E23)

Hi,

I'm trying to troubleshoot an intermittent USB issue with my HKS0402A1U/HKS202-E23 and am hoping someone might have some suggestions.

TESmart dual-monitor KVM - HKS0402A1U/HKS202-E23
Logitech G915 X Lightspeed keyboard
Logitech M720 mouse
Logitech webcam (currently removed from testing)
Windows 11 hosts
I've had this same hardware configuration for 3 years- same NUC and same Lenovo work laptop.

The keyboard and mouse will intermittently disconnect from the active computer.

Typical behavior:

Keyboard stops responding.
Mouse also appears to disconnect.
Windows often plays the USB disconnect sound.
Sometimes they reconnect automatically after a few seconds.
Sometimes they remain disconnected until I unplug and reconnect the USB cable between the computer and the KVM.
On one computer, I occasionally had to reboot before they would reconnect.

Video output through the KVM has always continued working normally.

I've now reproduced this on three different Windows computers:

The behavior is similar on all three, although the severity varies.

To eliminate other variables, I simplified the setup as much as possible.

Current configuration:

Despite that simplified configuration, I still see intermittent USB disconnects.

If the keyboard and mouse are connected directly to the computer (bypassing the KVM), they are stable.
Bluetooth operation is also stable.
The issue only appears when using the KVM's USB switching.

Is this a known issue with this model?

Are there any recommended settings, firmware, USB compatibility notes, or diagnostic steps I should try?

I'm happy to provide additional information (Windows event logs, USBTreeView output, exact KVM model number, etc.) if that would be helpful.

Thanks!

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