I-485 Application Submitted to Chicago Lockbox – No Update Yet

My spouse is the primary applicant for our I-485 application PD: current, and our lawyer mailed our package to the Chicago Lockbox in Elgin on December 23, 2024 which was delivered the same day. It’s been nearly a month, but our checks haven’t been cashed, and we haven’t received any updates or receipts.

In the past, this process was much quicker for us—checks were cashed within two weeks, and we received receipts within 2-3 weeks. This delay is making us worried that our application might have been lost or there’s some issue.

Is anyone else in the same boat? How long did it take for you to receive your receipt recently? Should we be taking any steps to follow up with USCIS, or is it just a matter of waiting longer?