today i was dced from the game while i was lvling my alt with hb. so when i get mail from blizz, they say "Type of Violation: Exploitation Category of Violation: Third Party Program Character Name Involved: Combatpanda" and i know i wasn't reported and i didn't recive any whispers. And i know that cuz i was there watching bot, checking whispers and bags etc. And as i can recall one of the main advantage of hb is that it is not recognized as third party program. so my question is is that possible that hb failed there or they checked my acc randomly?
You must have been reported, and a GM followed you for a bit. Though luck, leveling bots are the least reliable, and have the higher chance of getting you ban as it is terribly easy to spot them.