@oneoftheunderdogs: How/where did you check the "updatedattimestamp"?
Update: Thanks to Reddit, here are the instructions on how to check if your case has been updated recently. What that "update" means is anyone's guess, however.
1. Log in to your USCIS account
2. Copy your receipt number
2. On the same browser tab, paste this link on the address bar and press enter:
https://my.uscis.gov/account/case-service/api/cases/ReplaceWithYourCaseNumber
Replace the last part with your case number.
Note: It doesn't work if the case your looking at doesn't have any electronic documents scanned.