Bookmarks and Search

When i start to do a input into the searchfield from the Bookmark App, always after insert the first letter the focus is gone. I have always to klick again into the Field to input the second and more letters. This only happens when i input the first letter.
This is not happens in the global Searchbox.

Bookmarks App 13.1.3
Nextcloud AIO v7.9.1
Nextcloud 27.1.5

Has anyone else this also ?

Best regards