Unless your future employers start asking questions based on
your COS (why your service period is longer than usual, etc.)
Example, this also happens to PES C/E/F personnel where they are
looking for a job where their prospective employers want to know
why they are Admin Support Assistant/Storeman/etc because they know
these vocations usually are for those with PES C and below, and
usually for the employer's insurance reasons, etc. (So just because
it is not printed on the COS doesn't mean employers do not know how
to spot)
Again, that is provided they are so eagle eye to spot unusual
stuff or meticulous enough to do a background check. As far
as I know private sector usually are not so "neow" when come to
this kind of thing.