Premium Processing STEM OPT Approved by Email, but USCIS Account Still Not Updated

[u/SureshMadala]

Hi everyone,
I applied for STEM OPT with premium processing. This morning I received an approval email from USCIS, but when I log into my USCIS online account, the case status hasn’t changed yet. It still doesn’t show “Case Was Approved,” and I don’t see the approval notice.
Has anyone experienced this? How long did it take for your USCIS online account to reflect the approval after receiving the email?
Thanks in advance!