JQL search with contain ( ~ ) operator is not recognising underscores ( _ )

Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. Below JQL search returns all the records

"CWS Logs" ~ "CQA_CWS"

2. However, if I run the JQL as below so that only those issues are returned which has CWS Logs value like CQA_CWS_VP*, no results are returned.

CWS_LOG ~ "CQA_CWS_VP"

3. Even tried with "*" and it does not work:-

CWS_LOG ~ "CQA_CWS_VP*"

Expected Results

When running JQL like below, it should return records with CQA_CWS_VP*

CWS_LOG ~ "CQA_CWS_VP"

Actual Results

No results are found when running below JQL search:-
CWS_LOG ~ "CQA_CWS_VP"

Workaround

Currently there is no known workaround for this behavior.