So, let me get this out of the way first: I am not saying that the gauntlets are not bugged, because I do not know for certain.
I have seen both scenarios from video documentation, but they were on different classes, and using different skills, but I have not extensively tested it. Question: Should Epiphany clear only the negative effects of the SG, but still allow you to keep the armor stacks? Where does it say that Epiphany (and other similar skills) should release you from all Crowd Control effects?
Blizzard does not share any info with the players about what is “supposed” to happen, so we are left to look at the item description and make educated guesses, and to observe what happens in game.
If the same actions produce different results, then I would agree that something is bugged regardless of what their original intention was.
So, that being said…
In your post above, you say that your movement speed returns to normal, but that you can not teleport or attack afterward, no matter how long you wait. Can you reproduce this consistently, or inconsistently? Can you record a video of this and post it here?
In my last post, I said that casting Epiphany should not clear the negative effects of the gloves, but that is just my understanding of what I have seen in the game, and read on the forums.
If you think that it SHOULD clear the negatives, then I think we agree, but that is not what I have seen and heard. Do you know that this is how it is intended to work, or is it just an opinion? Blizzard has never said what is supposed to happen under every circumstance. Perhaps that is why there are inconsistent results, and people come here to say there is a bug, but when they test it more, they can either not reproduce it, or do not have the patience to give it a thorough test.
What are your thoughts, and what do you base them on?
If we are only talking about permanently losing the ability to attack and teleport after casting Epiphany while you have Stone Gauntlet stacks, then I think we can all agree that this is a bug. Can you provide a video showing this in action so that Blizzard and others on the forums have something to rely on other than anecdote?
On a side note, and if you plan to actually run some tests:
If you have 3 stacks of SG buffs while Epiphany is active (no penalty to attack/movement speed), but then Epiphany expires, what happens on the next hit from an enemy? Do you get 4 stacks of armor, and 1 stack of negative movement/attack speed? Or do the previous 3 stacks get overwritten as negative stacks?
If you DO get mixed stacks where some stacks are only armor, but some include armor and the attack/movement debuff, and you then cast Epiphany, does it clear all the stacks, or just the negative effects of the stacks? Are you verifying your attack/movement speed and armor in your inventory to make sure it is consistently clearing the attack/movement speed debuff, but keeping the Armor buff?