New systems arrive faster than training can follow.
Training happens too early
Classes and videos land weeks before go-live. By the time staff meet the real screen, the details have faded.
Support is stretched thin
Super-users and help desks cover whole units and whole systems. On a night shift there may be nobody nearby to ask.
Workarounds spread quickly
When nobody can show the right way, people invent their own. Those shortcuts get passed along and are hard to undo.