I know that a few people knew (mostly people that I showed it), but I never really brought attention to it because it was pretty fun and I didn't want it to get fixed.
With the old scarab armor, you could cancel any melee attack and after you are done channeling, the melee attack would play again from the start.
The fun part was replaying the strong attack at the end of a melee combo without needing to go through the combo again, but if you timed it right you could also get an infinite amount of 12x combo heavy attacks without ever consuming the combo counter. Not very mobile, but do that on a gunblade and you are a rather effective and immortal turret. That gave Inaros something pretty effective that no other frame could do for a long time.
But well, due to the rework changing how the abilities work, that funny interaction with melee attacks is gone.
Was that like a well known thing that no one ever talked about or was it a well guarded secret? Genuinely curious.