If an ftp directory is bookmarked, a trangle is added to the bookmark icon in Manage Bookmarks window. Clicking the trangle in such case results in ever lasting movement of circular arrow icons. Maybe related to No. 41389
OK, so it is a feature as stated in No.36224. Do you need to have this feature in Manage Bookmarks? Besides, Bookmarks pulldown menu does not support this feature. Oh, well. Wontfix likely.