This has been bugging me for a while.
The suggestions dropdown in the reference box in guides doesn't work when you enter a hyphen (i.e. most of the time). Compare the following:


I've no idea why that particular pericope is suggested, but clearly it should be suggesting pericope ranges that begin with 2 Corinthians 8:16.
The hyphen doesn't break the dropdown in the CBV tool nor Explorer or Passage Analysis tools (nor for that matter in Proclaim).