The workaround suggested when searching for Customer Request Type stopped to work.

What's happening
The workaround suggested to search for Customer Request types stopped working.
In earlier versions of JIRA Service Desk (2.4-OD-04) users could use the following syntax when searching for Customer Request Types using JQL:

"Customer Request Type" = "<projectKey>/<request-type>"

I worked just fine and sometimes all the user needed to do was to look directly in the database the correct values for the <request-typ> when the usual values didn't match.
However, since 2.5.1-OD-03-002, it stopped working.

Expected behaviour
Searching for Customer Request Type should be possible using the correct syntax:

"Customer Request Type" = "<projectKey>/<request-type>"

Actual Behaviour
It's not possible anymore to search request types even if the values for the <request-type> constraint match the database key values.