It’s not a lie, it’s true. An FO was let go during IOE by GM for essentially being zoned out during IOE because they were waiting on their legacy class date

Been occasions of FOs not having their workbooks done during IOE because of class dates. One guy was actually brave enough to pull his new legacy onboarding paperwork out in cruise during IOE. Captain check airman called when on the ground, pilot was removed.

So yes, the policy is IF the check airman gets wind that an FO has a class date at a legacy, their IOE will be suspended, as they are trying to get FOs on the line who will actually fly the line.