Cursor positions in wrong column after delete + cursor up

When I have 

foo-bar
// baz

and the cursor is in position just before 'baz' (col:4)

I press 3x <backspace> to remove the space in front of baz and the two '/'.

The result looks like

foo-bar
baz

with the cursor in front of 'baz' (col:1)

Now I press <cursor-up> and I would expect that the cursor is in front of the first foo (so col:1)

Instead the cursor is between 'foo' and '-bar' in col:4 again, where it was before I started deletion 3x.

This is a new unexpected behavior.

It might be nice, if the line 'foo-bar' would have had also '// ' in front, but this is not the case.