Especially noticeable when using weapons with low attack speed
Steps to reproduce:
1 Hold LMB for heavy
2 Release LMB as soon as u see heavy starts to go off
3 Immediatly press and hold LMB again
What will happen
1 You will get delay for your “chained / queued” heavy attack
2 You will probably get wierd inappropriate animation for weapon (in case of falch it “getting in place” between two heavy attacks, and all of that while you still holding LMB)