I'm not sure there is an easy workaround but I spotted titles with fill stops in the name failed to find metadata. Examples are 'The F.B.I. Files' or 'Marvels agents of S.H.I.E.L.D'. It's appears full stops get switched to spaces which makes sense but not for known acronyms.

A very minor problem and one I can't think of a simple solution too other than white listing known acronyms. Searches did work when I removed the spaces but that doesn't help a lot.