Bookmarks lose visual formatting

Hi,

I have a gantt visual. I want to display the Data Label on the right of each gantt-line. So i have set Data Label > Position > Right.

Then I press "Update" to a bookmark. When switch to another bookmark and back to this, it goes to default posititon: 

Is this a bug?

I've tried:

- Recreating the bookmark

- Unticking "Data" from the bookmark