By default, JIRA JIRA will limit the search results to 1000 items.
When the Agile Board Filter Tools & Filters for Jira Software search returns more results, the following message will be displayed:
...
There are two possible ways to proceedfix this:
Narrow your search criteria to limit search results.
The maximum search limit is defined by the jira.search.views.default.max property.
JIRA
Contact yourJira administrator to increase it.