We're seeing a strange issue where the SharePoint "Did you mean" feature is returning a suggestion spelled exactly the same as the search term.
Our Search spelling dictionary is set to Dynamic so we're not sure why this would be happening.
We did find an article mentioning similar behavior when users clicked on a refiner from the search results but that is not the case with us. DYM not working with refiner
I'm wondering if anyone has seen this behavior and any suggestions about a fix besides modifying the display template to stop showing the DYM suggestion if it matches the search term.
More Info: I was able to figure out an instance that causes the duplicate results although I'm not sure why. This query in our search results web part causes the issue:
{SearchBoxQuery} ((ContentClass=STS_Web OR ContentTypeId:0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF39*) -ContentClass=STS_ListItem_DocumentLibrary) OR (BCSEntityName=IHITV) OR ( PartialPath:/communities/blogs/)
This one doesn't:
{SearchBoxQuery} ((ContentClass=STS_Web OR ContentTypeId:0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF39*) -ContentClass=STS_ListItem_DocumentLibrary) OR (BCSEntityName=IHITV)