Investigation complete - Unable to diagnose with current information

A week ago I filed a bug report about Safari with Apple’s Feedback Assistant: (FB22057274) Pinned tabs: slow-loading target="_blank" links appear in the wrong tab. Apple has marked the “Resolution” of this bug report as “Investigation complete - Unable to diagnose with current information.” I was not notified by Apple that the investigation was complete, nor did Apple ask me for more information.…