Rent check stolen - been 150 days, no update

Long time Chase client since 2005 and I got my rent check stolen and deposited in BoA by the thief back in June. I submitted all my paper work and was told 30-90 days. Called at the 90 day mark and they told me BoA needs to respond and told me that the timing is usually 90-120 days. It’s way passed that and I’m looking for guidance on how I can get my money back. Why does this differ so much from when there’s fraud in credit cards?

Update: I received my money back!!! After receiving a notice they never had my documentation, that week I immediately went back to Chase, sat with a banker associate to help me fax it. At the same time while sitting there, I called the claims department to ensure that what I faxed arrived on their side. Called 3 days later to triple check and they all confirmed to have received it and sent the documentation to “the bank of first deposit”. That was two weeks ago and finally saw it back in my bank account.