Issue Summary

Using the ~ (CONTAINS) operator in Advanced Search via JQL that includes an underscore _ character returns more results than expected

Steps to Reproduce

1. Confirm that Jira is using Lucene and not OpenSearch.
2. Create a SCRUM sample project to create issues to test with.
3. Create an issue that includes string “Task_Status_Scrum_Master”
4. Use the following JQL via Advanced Search:

 text ~ "Task_Status_Scrum_Master" 

Expected Results

JQL search returns only issues that have the string “Task_Status_Scrum_Master”.

Actual Results

JQL search returns all issues that include strings, such as “Task”, “Status”, “Scrum”, “Master”, and “Task_Status_Scrum_Master”

Workaround

When constructing new JQL queries, add escaped quotes to the search text, for example:

  text ~ "\"Task_Status_Scrum_Master\""

Escaped quotes are not automatically added in previously saved JQL queries, which can lead to different search results if Jira has been recently upgraded.