Looking around, this seems to have happened to several others. It took about a month after reporting the glitch before it was finally fixed.Is anyone else having trouble with the HMRC app/website? For the last week, when I log in to try to check allocations, I get this:
Once I could see my account again, with the years still not being allocated yet since payment last July, I rang to ask about this.
This time they said the payment had now been allocated across all the relevant years on their system, even if my account wasn't showing it yet. She then said that was a simple fix and she would take care of it after the call.
I was delighted when I checked my HMRC app/account a little while later to see that all the paid for years were finally showing as Full Year, also reflected in my updated Pension Forecast.