Website user can not login from mobile application

Hello;

If the username is website user (not system user), then I can not login from the mobile application?
If this is the case, so that means if the student or his parents need to login from mobile to check student activity, it requires to create for them system user and not website user?

Below is the error that I am getting when I am trying to login from the mobile application if the username is website user:

Regards
Bilal

Yup. Can replicate!

However, login is possible through the mobile browser.

Created Github issue for this: