Extra parts appearing during sequence play in Studio 8.1.2

Hi,

There are 5 .pvi sequence files in my ThingWorx Studio project to demonstrate an assembly of an object.

The issue is when my model loads or starts playing the sequence, it shows those parts also that should appear after a particular step.

I can't use model item to hide those parts as there are plenty of small model parts.

When I have created those .pvi files in Creo Illustrate 3.1 those parts were hidden and worked as expected in play mode of sequence.

Regards,

Shashank