Dell Canvas stylus buttons are releasing too soon

Summary

On the Dell Canvas, with upstream libinput, the stylus buttons are released as soon as they are pressed.

Bisected to commit 9bba1499, thanks to the evemu-record below

Steps to reproduce

Run the evemu-record below, and see in libinput debug-events

libinput version you encountered the bug on

commit 9bba1499 and after

Hardware information:

Dell Canvas 27

Other log output:

• evemu record output: dell-canvas-btn1.evemu
• libinput debug-events output after 9bba1499: dell-canvas-btn1.libinput-broken
• libinput debug-events output before 9bba1499 (working): dell-canvas-btn1.libinput-OK