SetVectorParameterValue throws exception for UMaterialInstanceDynamic after load, called by a TimerManager managed timer.
Weird thing is that if my UMaterialInstanceDynamic instance is instantiated in the same timer function, then call SetVectorParameterValue(...) succeeded, and I can see the material changed. However, after I add this variable as a class member, and init it in constructor but call it in timer function, it fails with the following exception.
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