Here is somthing u may follow.
Ignore it if already done any of them
1. File AR-11 (must file or File AR-11SR if SR country)
2. Call 800 No and update (which u already done)
3. write a letter to TSC on
USCIS TSC
P.O. Box 850891
Mesquite, TX 75185-0891
Subject: Home Address Update Request for Pending I-485.
Dear sir/Madam
.........
...... your all info
xyz.
Attach all pending petition receipt copies
-----------------------
Wait for 30 days keep eye on online status if it is changed to 'We response your request......"
if u receive letter than fine, otherwise call 800 again and confirm addr.
If u are expecting FP or any other doc. even addr is changed make ur relationship with ppl who live on old addr too. you never know
Good Luck