UE5-Main Ragdoll and Phat Editor strange behavior. All ragdolls broken

Getting very strange behavior trying to create new physics asset for character. Third Person Template PhysicsAsset has same problem…
Ragdoll curls up into ball.
Phat editor Simulate seems broken too - even single body not working.
Migrating existing working ragdoll from UE4 doesnt work either.

Has anybody had any decent ragdoll working in Chaos/UE5?

Thanks for any feedback

fwiw Chaos Ragdoll works fine in the new 4.27 Chaos Build release… so looks like it is specifically a Ue5-main / Chaos problem