Mortars damage vehicles/fobs underground

[Skitrel]

As the title says, Mortars can damage vehicles and FOBs underground while the infantry in the same area remains safe and sound.

Discovered this playing scenario sunday on Drakelings where we had dug out a heavily defended underground base. Had 3 APCs and a FOB under missile silo on the Russia v Germany paratrooper map(forgot the actual name), the area was hit by mortars prior to the enemy assault. It heavily damaged the APCs, destroyed all trucks underground simultaneously and caused the FOB to require redigging. No infantry in the area were caused damage whatsoever, so it's something to do with assets.

For all I know this could be an irreparable problem caused by the engine that's been known about for some time. It's just quite rare that I get hit by mortars with vehicles underground so I've not seen it before, thought I'd bring it up.

[K4on]

Explosions go through objects and damage other objects in cover.
There is no known fix other than reducing the explosions splash.