Query returns incorrect result when using clause Steps - Contain Words - "#"

My test cases are using hash tag (#) in steps for query, for example "#login #search". I created a query as below and expected it return only test cases have steps contain "#SearchABC". However it return the ones with no hash either.

My Query:

The below "Not Match Test Case" does not have "#" in steps so it should not be return.

Is it an issue? If no, is there anyway to query exactly a word contains "#"?