I would bet you are in the same industry as I am, the reference to the training is a Mandatory in my field.
However , unless you are actually out of compliance, for some employers those courses are expensive. If you were in compliance and its just the time of year they update, no sorry I wouldn't include you as well. Those training places can be precious depending on the company and the set up. If I know someone is leaving then I would not waste the place on them.
Saying that, if you are over the year update time then you shouldn't be delivering without that course, so the employer is silly.
I may be wrong and you are in a different industry, but if its mine and you are not out of date, No I am afraid you would not be on the list.
It sucks fine, but in reality there are a hundred reasons you could have avoided that qualification (You are correct it would have been pulled back , as dependent on the size of the company it would have cost them a payment).
If it is the industry I am in, the second someone has one foot out the door, it makes them unreliable for shifts because so few people are prepared to work their notice period. Its not the sort of thing you can leave to chance , if someone is intending to leave they can often go extremely quickly leaving people in the proverbial. It can genuinely be unsafe, so I am afraid when I know people intend to leave, I don't rely on them any further, I have been burnt so many times.