It is. We use quite a few third-party sources to get results, and sometimes they decide to break things like this. When that happens, we have to detect queries that won't work with certain sources and either disable those sources or filter their results again afterwards. Lots of crazy bits in there, unfortunately.
posted by crazedpsyc 5 years and 2 months ago Link

Thanks for the answer. Now regarding those sources, ditch them (if possible) ! Users playing with quotation marks are usually willing to lose some recall to preserve precision.
posted by <hidden> • 5 years and 2 months ago Link