Wrong quota display at folders

The display of the used quota in a folder seems not to be valid. Although a folder is used with 45,5 MB (maximum 51.2 MB), the display shows an load factor from 43 % (what is almost ca. the half of the quota).

see also: https://community.openolat.org/url/RepositoryEntry/204374019/CourseNode/96041569218328