Can not create a new tag with Russian letter 'б' inside the tag

[Walder 33]

It is impossible to create a new tag with Russian letter 'б' from the bottom of the note. For example, I want to create a new tag 'Гобелен'. I can type first two letters 'Го'. But when I type the third letter 'б' nothing happens.

This tag I can create only in Tags sections or with 'Control - Command - T' shortcut.

If the letter 'б' is the first one in the tag - no problem:

 

What is wrong with this Russian letter?