it is one shot with a rather long refresh time so it doesn't make force field bubbles completely useless. I noticed a lot less people using the force field bubble once that got added + there are better cards to use now too.
But it makes the counter unpredictable hence less people use the bubble = not good gameplay mechanics just as I'd expect from Dice. A proper developer would have taken the time to make a tactical system whereby the bubble using player could make an ingameplay decision based on the potential counter and the counter using player could utilise the ability strategically either offensively or for area denial or funnelling the other player(s) movements, etc.
Dice make nice looking graphics but anything else is shallow and **** and they really should just stick to what they do good and get someone else in to do the actual gameplay nitty gritty and bread and butter feature coding - most other developers manage to mostly make basic systems work without hideous glitches and hidden problems and without requiring going back time and time to patch over specific issues.