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Pretty sure that's exactly what it is. The autoloaders line up the shells in a ring around the cupola, and a lot of the MLAW type stuff the Ukrainians are using strike the tanks from above, where they are more vulnerable, too. Ignite the shells in the turret and it blows right off.
Historically Russian tank design seems to have favoured smaller tanks, which made sense when the main threat to a tank was another tank - harder to spot and harder to hit. The preference for autoloaders over manual loading is part of this. It seems that this design preference is quite disadvantaged in the era of smart weapons.
Is It the ammunition on T72s auto loader blowing up