Pen starts to have long delays after some usage, dmesg says wacom_idleprox_timeout: tool appears to be hung in-prox. forcing it out.

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Device: Thinkpad X1 Yoga 6th gen
Stylus: Lazarite AES pen, builtin pen (same behavior)
OS/kernel: Gentoo, Linux 6.6.13

Normally the pen delay is relatively small (although still slower than on Windows), but after a while of usage it becomes much slower (cursor lagging behind). When this behavior occurs, each approach of the pen is accompanied by this message in dmesg:

wacom_idleprox_timeout: tool appears to be hung in-prox. forcing it out.

Reboot fixes it temporarily