diff --git a/src/pyj/select.pyj b/src/pyj/select.pyj
index 9b887f556d..55278ffc54 100644
--- a/src/pyj/select.pyj
+++ b/src/pyj/select.pyj
@@ -238,5 +238,7 @@ def move_end_of_selection(pos, start):
         new_range.setEnd(p.offsetNode, p.offset)
         other_boundary_changed = r.startContainer is not new_range.startContainer or r.startOffset is not new_range.startOffset
     if not new_range.collapsed or not other_boundary_changed:
+        # we ignore the case when the new range is collapsed and the other end
+        # of the selection is also moved as this is a chromium bug. See https://bugs.launchpad.net/bugs/2054934
         sel.removeAllRanges()
         sel.addRange(new_range)