I'm guessing that by meaning shackle inversion, you are talking about the shackle getting stuck behind where it mounts in the frame?
The usual case that causes this is the front of the leaf springs are bent or too weak to keep the shackle forward. I've seen it happen a few times on stock springs that were worn and the owner decided to go airborne at the top of a hill.
I have seen revolvers on all 4 corners before, usually they are only on the rear, and the driver's said that they handle differently. Something to get used to I suppose.
If I were having that problem and the leafs aren't bent, then I think I would invest in boomerang shackles at least for the front. Then you still have stability for the side to side movement to keep the steering intact.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...