I have found a bug that is patched in all(that I know of) game versions prior to Minecraft Java 1.15.2. You most likely know about this bug, but I am here to tell you it has not been patched in 1.15.2 yet. If you switch "attack/destroy" keybinds to, say "u" (or any key on the keyboard), and hold down that key while aiming at animals, entities, etc., it will spam the key, which will make the player "attack" insanely quickly. This bug is detected by servers and servers can mistakenly ban players for KillAura. Thank you, and I hope to hear back from you if I was the first person to find this! Stay safe and healthy!

P.S. I have a video, but it exceeds your file limit.