Chaos crash on linux dedicated server only

Hi! Any ideas what exactly can cause crash in on linux dedicated server? (clients are fine) It happens very vary rare , testers even cant describes steps to reproduce it. but its very very annoying.
Chaos::TConstParticleIterator<Chaos::TKinematicGeometryParticlesImp<double, 3, (Chaos::EGeometryParticlesSimType)0> >::operator++() [/UnrealEngine/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/ParticleIterator.h:416]
Chaos::FPBDRigidsEvolutionBase::ApplyKinematicTargets(double, double) [UnrealEngine/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDRigidsEvolution.h:739]
crash is during array iteration FPBDRigidsEvolutionBase::ApplyKinematicTargets


have no idea what to check.