Shade smooth doesn't work for all frames

[ZhengdiYu]

System Information Operating system: Windows 10

Addon version Broken: 2.1.1

Describe the bug The shade smooth doesn't work for all frames.

Steps To Reproduce Steps to reproduce the behavior:

1. Click smooth group and import .obj meshes

Expected behavior Meshes of the whole sequence should be smooth. However, they are not. After manually click shade smooth, only one frame became smooth, others are remaining unsmooth.

Screenshots Config:

Visualization:

Visualization after manually shade smooth and the next frame:

The next frame and all the remaining frames are still unsmooth.

[ZhengdiYu]

Oh, my bad. I think we need to do this shading in 'Mesh sequence' tab.