It was a trivial matter, if one considered it trivial.
Taking it at face value, it was really just a junior showing some respect to a senior.
The hierarchy and order of the academy, which had begun alongside the Empire's history, were by no means light, and no one would consider it problematic for junior and senior students to show a bit more courtesy than usual.
However, when the current imperial family's bloodline and the former imperial family's bloodline were involved, things became a bit different.
The Schwaben had been the imperial family for three generations now, but before that, the Armian had lived as the imperial family for nearly nine hundred years.
A hundred years was insufficient to completely erase from the people's minds a great family that was the very history of the Empire itself.
One of the most definitive ways to break that perception was through an official abdication.