When using an ampersand (&) in a query in a Custom List 2.0 app, the query may not fetch the expected records.
For example, if you have a query that consists of (Tags.Name = "Green & Blue"), the query may not fetch work items with that tag applied.
Release : SAAS
Replace the & with the HTML entity &
Using the above example, the resulting query would be
(Tags.Name = "Green & Blue")