User's name starting with Å/Ä/Ö don't show up when searching with lower case letter when making pull requests

Case:

Want to add "Åbjörnsson, Alexander" to reviewers.
Type "å", nothing shows up.
Type "A", Åbjörnsson, *A*lexander" shows up.

Expected:
Åbjörnsson, Alexander should show up in both cases.