Possibly, the detonation will be on impact with the cage and take a lot of momentum away from the penetration power they have.
its a nano second but it should be in thousands of pieces spread over the entire tank rather than one penetrating spot.
Not to say they can't get a tank kill but Lancets generally aren't that effective against MBT armour - the shaped charge variant is more general purpose designed to be able to be used against a variety of targets (and originates from an industrial rather than military design) and not optimal against heavier vehicle armour, the explosive warhead just doesn't have the punch. They will easily take out lighter armour and field improvised fortifications though.
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