There a is a issue I am having for quite a long time I hadn't been able to quickly solve, so I just sucked it up. The issue is, that if I plug off the Yubikey off the laptop's USB port, one CPU goes haywire 100% usage and some, but not all services or applications that require internet access cannot reach it. The issue resolves itself when the Yubikey is plugged back into the USB port or the pcscid.service is restarted: sudo systemctl restart pcscid.service There is nothing relevant I could find in dmesg output, probing journal: journalctl -xeu pcscid.service
So I (re-)inserted the config option into the file and now I wait and observe what will be going on.