Yes, and I recall my accountant from my home country requested my NPWP last year when I filed by taxes.With CRS in place, this is going to be much more common.
Essentially you become one identity for all CRS participating countries, and they link all your TINs.
Since they are working in Indonesia they probably at some point provided the Indonesian TIN to UK authorities. Probably to establish Indonesian tax residency. In turn UK banks reported account balances to Indonesian tax office.
Since they file taxes in Indonesia, and you are to report all assets (foreign and local) in your tax return every year, some mismatch due to missing account balances become trivial to discover.
It is then up to you to explain the discrepancy.