JQL search is treating the letter a as a wildcard

Issue Summary

For text-based JQL searches, if "-a" is included at the end of the string, Jira looks at this as a wildcard {*} rather than a string which then gives more results than it should.

Steps to Reproduce

1. Create 2 Issues in Jira, one having the Summary as "testing_46565-1-a" and the other as "testing_46565-1-b".
2. Do a JQL search on that Summary field for -a (summary ~ "\"testing_46565-1-a\"")

Expected Results

I would expect the results to be all matches with the "testing_46565-1-a" Summary

Actual Results

The results include all Issues with a similar Summary and looks at the "-a" as a wildcard, essentially making the JQL summary ~ "\"testing_46565-1*\"".

Workaround

As a workaround, you can change the Indexing language language in the General settings to "Other" which may be related to the stemming of the word "a".