CAP Fiori filter on blank or empty string

Hi. In my CAP project I added a dropdown for a field. Some records have an empty string for the value but when selecting the "blank" option we get two blank items show up in the search box.

I found that the query is being sent with the filter "value eq null" only.

Seems like a bug to me. Has anyone experienced this issue with filtering on blank and know of a fix?