Leaver not included on FPS despite being selected

SUGGESTED

After the payroll this month (tax month 12), we had a few irregular employees marked as leavers.  One of them was an irregular employee who had not been paid nor on an FPS for the whole of this tax year.

Even though I selected him, when the FPS was collated Sage dropped him from the list of those to send - he is still marked with no last FPS date.

I have also found an employee who was marked as a leaver a couple of years ago (before I took over running the payroll) and we have now received a tax code change for him for tax year 2023/24 - implying HMRC thinks he still works for us.

I am suspecting that HMRC is thinking the first employee I mentioned, whom I marked as a leaver this month, is still working for us.

Is there a way to ensure HMRC knows about the employee that was omitted from the FPS (and the other employee from a couple of years ago) no longer works for us?

Or will it require direct contact with HMRC?

Thanks