Filepicker truncates files' and directories' names while adding files from Webdav repository

1. Create (or use already existing) webdav resource with folders and files in it (or use existing one)
2. In admin panel enable webdav repository
3. In admin panel add repository webdav
4. In admin panel set parameters of webdav repository
5. Create course and add a teacher to it
6. Click add resource or activity and select file
7. Fillin name and Description
8. Click add in Content section and select webdav folder defined in step 4.
Then, folders and files with original names in wedbav resource should appear, but I see additional folder without name and other files and folders without first two letter but folders' names with backslash at the end.

1. Create (or use already existing) webdav resource with folders and files in it
2. In admin panel enable webdav repository
3. In admin panel add repository webdav
4. In admin panel set parameters of webdav repository
5. Create course and add a teacher to it
6. Click add resource or activity and select file
7. Fill name and Description
8. Click add in Content section and select webdav folder defined in step 4.
You should see folders and names with their original names