1) It seems to be a bug. Please, report it to the issue tracker.<p>2) You can read more about debugging DSLs here: <a href="https:&#x2F;&#x2F;confluence.jetbrains.com&#x2F;display&#x2F;MPSD32&#x2F;Debugger" rel="nofollow">https:&#x2F;&#x2F;confluence.jetbrains.com&#x2F;display&#x2F;MPSD32&#x2F;Debugger</a>