Goldman BG Check going on 6 weeks now??

My background check started mid-February and it's still going now. I emailed HR and they just said that it's ongoing and they'd reach out if they had any questions.** Is something wrong??**

I've already been given my start date and the website has allowed me to book my flight for the summer, access my documentation, etc. I just don't understand why it's taking so long and I need to sign a lease for the summer soon.