pam_tid.so asks for password instead of requesting for fingerprint when docked
Answer received from DisplayLink Support:

Unfortunately we are aware of this problem but this is one of our driver limitations. At the moment we are unable to change it as it happens due to the way MacOS is treating our application/driver.
In order to change that we would need Apple to change some options in their OS. I believe that in the future we will be able to resolve such issues but for now there is nothing that I can propose.