So we have an empty claim from 2 hardcore fanboys vs someone who went into the game and tested this.
I do wonder who is correct here, boy oh boy.
Now, lets see what actual patch notes say about this?
With the resurgence of Stug use we are looking at changing the way target weak point to prevent chain stunning scenarios which provided a frustrating experience for players.
Target weak point will now disable main gun temporarily no longer causes vehicle stun.
Not block the turret, disable main gun.
Suck up your bias fanboys, you're fighting reality too hard recently.