NSTask outputs QR code URL as all lowercase

[EthanRDoesMC]

Passwords are case-sensitive in QR code links, but NSTask seems to be unable to output uppercase letters.
Bandaid fix:
use lowercase passwords
Research:
Find out why NSTask does not respect letter case

[EthanRDoesMC]

Update: I don't think it's a bug with NSTask. It's usually a good sign that I've asked an XY question when I can't find anything on Google that even backs up my experience. So the issue is elsewhere.