it is not abnormal. Though they should update.

My 140 RD is in June, I cannot even check the status until I filed 485 in late Sept. And then nothing happened till approval in late Nov.

However, my 485 does update after my code 3 biometric, in about 12 days.

Heard lots of cases where nothing happened in online record, but suddently get approved.

So use online system only as an early signaling system. Do whatever you are doing, don't pay too much attention to it.