No one knows what all stages they went through post IP1. However, two scenarios have emerged.It is most likely the user did not update the date of his IP2. No one can will be allowed in the country without thorough vetting which means Background Checks, even if they have diplomatic immunity.
1. AOR --> MEP --> RPRF (optional) --> IP1 --> PPR mail
2. AOR --> MEP --> RPRF (optional) --> IP1 --> PPR mail --> IP2
All the checks and measures are being done as always and according to their norms. However, the status is not changing as earlier.
tks,
tbn2k18