For the user, this is a bug. Anyone in the office can set up a (directional) microphone and recover what they are typing.[1] Not sure how well you could pick up passphrases, but seems like private messages wouldn't stay private.

The user might not have the power to do anything about the open office, but most likely has the power to switch keyboards to something less audible.

[1] https://charleslabs.fr/en/project-Breaking+Passwords+with+a+...