It does not directly bother me but can lead to downstream inconveniences. Public services (in Germany) ime don't like mismatches in identifiers, especially inconsistent ones. If it is required then it might sometimes take more than one application (with a small explanation on why the mismatch is there).
As another example, if รค is substituted for ae in shipping addresses then automatic tracking for packages by DHL via my customer account breaks (as the address is not identical anymore).