How to make destructible to take damage from explosion when attached to another destructible?

I did try that a couple days ago and it did work well, but the thing is, I need the land to be movable, since what I really aim is for the ground mesh to simulate an earthquake feeling, moving in random rotation values.
Is there any chance that the form extended structures bug is fixed in UE 4.9?
And if I shift to C++, will it be possible to create a solution for this?
Thank you for your time and answers!