Problem

JQL search with select dropdown appears limited at 100 options. We can see this behaviour in Jira 9.4.14:

1. the select list dropdown only shows 100 options
2. other options can be searched by text and selected, but the same number of earlier options will then be removed
3. the maximum number of selections made for the JQL search is limited to 100 via UI

Environment

Jira DC 9.4.x

Steps to Reproduce

Create more than 100 options in a Select dropdown custom fields. Selecting more than 100 in Basic JQL search, in the dropdown, is not possible.

Expected Results

Any number of options can be selected.

Actual Results

Only 100 options are selected max.

Workaround

Edit the JQL in Advanced mode in order to add any options above 100. A better way to approach it would be to create separate fields and avoid reaching the 100 limit in any of them.

Notes

This most likely has to do with the Jira Safeguards introduced in version 8.22/9.0, there are a few documents on it but there is no apparent way to increase this limit:

1. https://confluence.atlassian.com/adminjiraserver0904/jira-software-guardrails-1188769019.html
2. https://confluence.atlassian.com/jirakb/introducing-safeguards-to-jira-index-1131089657.html
3. https://confluence.atlassian.com/jirakb/what-s-changed-in-jira-after-the-implementation-of-indexing-limits-1131089687.html
4. https://confluence.atlassian.com/jirakb/jira-indexing-limits-stats-1125876330.html
5. https://confluence.atlassian.com/jirakb/how-to-change-indexing-limit-safeguards-in-jira-1167752430.html
6. https://confluence.atlassian.com/jiracore/configure-safeguards-1107628196.html