Some ASCII characters are represented with equivalent HTML ampersand notation (&xxxx;) in the object preview

[lmammino]

See the attached screenshots.

If I add a document that contains a string with an ampersand character (&) this is displayed as '&' in the query results preview.

Seems to be related to the javascript function to convert the plain JSON string of the record to a navigable tree, in fact the JSON content displayed before the scripts finish to load are displayed correctly (cfr. second screenshot).