Keys #~ and /: are not working on Librem 13v3 and Librem 15v3 devices.
Reproducible on other operating systems.
References: https://forums.puri.sm/t/both-int-1-and-int-2-keys-on-librem13v2-uk-keyboard-dead/2317
Cause of the issue determined to be a faulty keyboard embedded controller firmware. Purism SPC issued RMA for all affected devices. Flashing fixed EC firmware fixes the problem, and PureOS correctly recognizes the mentioned keyboard keys.