There is a difference in the following two filters:
resolution = "\"Unresolved\""
and:
resolution = Unresolved
The first only finds the issues where the resolution is specifically set to "Unresolved".
In the database these jira issues have "11000" in the resolution field, which is the id of the Unresolved resolution in the resolution table.
The second finds the issues that are newly created where the resolution field is untouched.
In the database these issues have "NULL" in the resolution field. Unresolved is then selected because its default.
I would expect to find all the issues with the second filter.
Am i doing something wrong?