expanding diff context on pullrequest overview shows only the unmodified lines

When viewing a pull request overview (ie. http://server:7990/projects/TAG/repos/REPO/pull-requests/152/overview ), if a line has been commented on, and you expand the context around that line, the new context shows only the unchanged code.

I'm not sure if this is a bug or by design, but I was expecting the expanded code to show any the changed lines in the pull request, and got briefly confused as to why the code now looked obviously wrong as I was seeing original unmodified code + only one of the hunks of changes.

I'm not sure I made a great job of explaining that, but say I have a function:

if (foo)
{
   bar();
}
... othercode...
... othercode...
... othercode...
... othercode...
if (foo)
{
  bar();
}

and the pull request changes 'bar' to 'flibble', and I comment on the first change, in the overview page I see:

if (foo)
{
-  bar();
+  flibble();
}
... othercode...
... othercode...
... othercode...

then when I expand the context I see:

if (foo)
{
-  bar();
+  flibble();
}
... othercode...
... othercode...
... othercode...
... othercode...
if (foo)
{
  bar();
}

(with the - / + lines coloured appropriately)

and thought "why hasn't that call to bar() been changed, that looks wrong!" - as I expected to see:

if (foo)
{
-  bar();
+  flibble();
}
... othercode...
... othercode...
... othercode...
... othercode...
if (foo)
{
-  bar();
+  flibble();
}