In order to reproduce the bug do: [1] Open new text document. [2] Insert some text. [3] Insert 2 bookmarks somewhere in the text. [4] Display find toolbar and select 'Bookmarks' in 'Navigate By' drop down menu. [5] Click in front of the first character in or to position the cursor. [5] Click down arrow (previous bookmark) three times. The cursor jumps to the position of the two bookmarks and then to the end of the document. It seems that there is a bookmark at the end of the document, but it is not. Expected: No jump to the end of the document but a message, that there is no more bookmark. The other way round the same problem exists: If you click the up arrow (previous bookmark) several times the cursor jumps to the beginning of the document and it seemed that there is a bookmark at the beginning of the document.
I confirm it with Version: 6.1.0.0.alpha0+ (x64) Build ID: 77a535285f0fd5f2464430abdc67cf99be024868 CPU threads: 4; OS: Windows 10.0; UI render: GL; TinderBox: Win-x86_64@42, Branch:master, Time: 2018-01-23_23:04:23 Locale: de-DE (de_DE); Calc: CL
I also comfirm this. Maybe the navigation should wrap to the next available bookmark and 'Navigation wrapped' or something of the sort could be displayed in the findbar message area. Bug 115600 may be a better place for futher discussion of this proposal for navigation behavior change.
Checked with - version 6.0.6: Bug still exists - version 6.1.0 and 6.1.2: Works for me now.