The Zephyr usbip server used by the native_posix_64 board does not register a tap if the press is immediately followed by the release. With a delay of 100ms between press and release the events are registered reliably.

The issue does not appear to be in the usbip client as hold-tap works reliably with ZMK over USB and a usbip server on the host.

It could be fixed in the usbip server or in the hold-tap behavior, but fixing the behaviors will support other remote systems, see #1443.