Filter search for filters with underscore character causes to return no results

Atlassian Update – 17 June 2020 Hi everyone, Thank you for your interest in this issue. While this issue has gathered significant interest, we're unable to implement it. Since version 8.0.0, Jira follows a Unicode standard annex UAX#29 with regards to word boundaries. As per the standard, the underscore character (_) is not considered as a word boundary, which results in the behaviour described by this issue. Because splitting words with underscores would mean creating our own standard, we don't plan to work on this for the foreseeable future. Instead, we encourage you to use characters other than the underscore, e.g. a dash ( - ) or space, as a workaround. We hope that you appreciate our candid and transparent communication. Kind regards, Daniel Rauf Jira Developer