Unable to login to Business Manager right after creating account

Yesterday I created a new Apple ID, and immediately on first use the password did not work (even though I carefully stored it and typed it). I reset the password and all is well.

Today I created a new Apple Business Manager account, and sure enough, after my session timed out and I had to login again, the password does not work. I *know* I'm typing it and the user ID correctly.

Has anyone else experienced this? Does the problem go away by itself, or do I need to get another admin in our Business Manager account to reset my password for me?