JaxoDraw uses the issue tracking system of SourceForge to manage its issues.
There you can browse existing issues (bug reports and feature requests) and also submit new ones. You will have to register an account on SourceForge, if you don't want to do that, you should submit your bug reports via the JaxoDraw mailing list.
A collection of generic issues can be found in a dedicated section of the JaxoDraw User Guide, see Known problems and limitations.