As of JIRA Software 7.2.3 the Fix Version drop down on the issue screen only searches for typed text starting from the beginning of a whole word in a fix version. It would be nice if the list possibilities would be populated by versions which contained the input string in any part of the version. This behavior would be similar to how Bitbucket Server is able to populate a drop down list of branches matching the input text to any part of the branch name.

Example:

Say I have fix versions "hello1", "hello2", and "hello3" in my project. If I type "1" into the fix version field in an issue, currently the list possibilities will be empty and will only suggest that I can make a new fix version called "1". The desired behavior would be that the list possibilities contain "hello1" because the string "1" is contained in that fix version.

The lack of more powerful searching in this drop down becomes a problem when a project has many versions, the version strings are long, and the characters that differentiate the versions are found at the end of a whole word so many characters must be typed before the desired version shows up as one of the top results in the drop down list.