Thrall / Kharazim not attacking after issuing STOP command

[Ziggurat-1948]

As Thrall, if you activate Windfury and right-click near an enemy, and then issue a STOP command while within melee range of the enemy, Thrall will not automatically attack it. This same exact bug occurs with Kharazim and Deadly Reach. While under the effects of Windfury or Deadly Reach you can directly beging attacking an enemy, but if you then right-click nearby and issue a STOP command they will just stand there and do nothing. This bug occurs with enemy Heroes, Minions, and Mercs. It occurs with “Attack Move Target Point” both ON and OFF.

EDIT: I was recently informed that the same bug occurs with Xul and Cursed Strikes, and Artanis and Twin Blades. I have not yet independently tested them though.

EDIT 2: According to a very helpful reddit user, this is the explanation for this bug:

When an ability that will buff AA was cast, a Behaviour HoldFire will automatically applied to your hero. HoldFire will make your hero became passive, prevents automatic weapon acquisition. Similar to mounting up (if you mounting, you will not automatically AA if you near an enemy hero).

A-click (Attack Move) solves this issue.

After a quick search, some heroes that have this behaviour are:

• Artanis: Twin Blade (W)
• Arthas: Frostmourne Hungers (D)
• Fenix: Charge Up (Unused, can be ignored)
• Karazim: Deadly Reach (E)
• Samuro: Critical Strike (W)
• Xul: Cursed Strikes (W)
• Thrall: Windfury (E)
• Zagara: Envenomed Spines (1)

Why Blizzard does this? No idea. Probably to fix some bugs from a long time ago. Can’t really tell the difference between not applying the “HoldFire” behaviour.

[Aphandra-2120]

It would be silly to AA first and then buff the next, I guess.
It often annoys me, too. I’ve been standing around doing nothing a little too much. I didn’t ever figure out, way, but likely this. Some ability not happening due to minion death or stun or somesuch, and the hero does nothing.