This bug occurred in Education Edition on version 1.21.06. (There was no option for versions earlier than 1.21.50, and Education Edition is always a few versions back) Here's what happened:

Step 1: At night time, start going through a nether portal.

Step 2: In the portal animation, click on a nearby bed. Mine was two blocks away from the portal.

Step 3: Wait. While sleeping, the nether loading screen should pop up. Upon loading in, you should be teleported to the coordinates of the bed, but in the nether. You can tell this worked not only from the coords, but the lack of a generated portal.