Texture resolution with using FlipBook.

I have a trouble with using FlipBook.
I use FlipBook to show animated Texture on game I made.
On UEeditor , It works correctly.It shows correct resolution.
But after packaging game , It doesn’t work . It shows low resolution.
I use 2048X2048 texture map.and details are below.



Is it problem of texture compression ?
I hope that someone solve it.
Sorry for poor English.