AcquireSRWLockExclusive Crash!!! Help

			SourceInstance->OnScalarParameterUpdated().AddLambda([this](UMaterialParameterCollectionInstance::ScalarParameterUpdate DirtyParameter)
				FRWScopeLock WriteLock(DirtyParameterLock, SLT_Write);

Engine: 4.27.1

This one crashed while building complete to 100% and ready to pop up the tip title. I am using the Niagara Effects in scene with Niagara script and Niagara Parameter Collection. This NPC contains the MPC and is changing value in editor / game alltime. So it Crashed in the lambada, finally exception occured in the AcquireSRWLockExclusive. ANY HELP???

Hey guys resolved, need to change to weaklambda in NPC bind, everything is good to go now