Are you getting duplicate object values (or whatever those Objects output in .ToString())? Eh, so was I, after I edited the display template for String. Found a fix, though.
Okay – I just ran into one of my more stupid mistakes since.. Well, since forever.
I had made some quick and simple edits in String.cshtml display template (among quite a few other edits before building again and seeing what happened), as I added support for Enum values there. After that I started getting duplicate values for String-typed properties.
Apparently, mistakes were made.
Luckily, this was easy to fix (but probably still worth documenting):
I had added the code for handling Enum-values, and also changed “@model String” -declaration to awful “@Model object” -one. Changing the type was supposed to happen, but capitalizing the model messed up my DisplayTemplate. Instead of casting the model to object, I was simply calling Model at the start of the template (basically, that was a shorthand for Model.ToString()), hence the “String object String”-kind of duplicate values on the display template.