When specifying a recordIssues pipeline step tool name that contains + characters, those + characters are replaced with the escape sequence (ampersand pound 43 semicolon) when presented on trend chart titles and in the build summary.  There may be other characters besides + effected by this issue.

For example, the attached screenshots result from this:

recordIssues tools: [clang(name: 'clang++ 11.x c++17', id: 'clang11_cpp17', pattern: 'build_log')]