(Early) March 2020 expiration, but no approval yet. Hopefully, it renews soon.

I called them, and their email response was: "U.S. Citizenship and Immigration Services (USCIS) records show that your case is currently pending adjudication. However, we have had to perform additional reviews on your case, and this has caused a longer processing time."

"additional reviews" sounds scary to be honest. I'll call them again in mid-November.

Edit: applied for renewal in October 2018