Caret jumps columns after downarrow

[elextr]

1. put cursor in the middle of line 1 in a paragraph of 4 or more lines (I used here ), so all lines are longer than the starting column
2. select line with SHIFT+ALT+L, line is selected and caret appears at the start of the next line
3. press downarrow, caret moves to the line after but to the column in 1. above

Since the caret after step 2. is at the start of the line a user is reasonable in assuming that downarrow will move to the start of the next line, not to the middle of it.

Reported as a selection problem on ML, but is really the caret position moving in an unexpected way.

Suspect editor_select_lines() should explicitly move the current position to end of selection? (link above is to middle of that function ;-)

Edit: might be in Scintilla since Geany just calls SCI_SETSEL which is supposed to set current position to the end, also downarrow is directly actioned by Scintilla AFAICT so the problem may be entirely there.