The network doesn't seem to perform well in my custom video.

[BeiningWu]

I'm a newcomer(or a total noob) to cv and I'm not an english native speaker.
I test the network in a demo video, and I found the network doesn't seem to remember and propagate trimaps well.
I test the network in a RVM demo video and the results are shown below:

This is the result of the first frame in my test video. It looks well and I give the accurate trimap to the network.

But when the network propagates to the 19th frame, the result performs not well.
I don't konw it is.

[concrete13377]

I have the same problem