Media stops showing after 10:20

[leonardoazzevedo]

Hello guys, I'm having quite an annoying problem with my composition. I have a few layers and some of them disappear after 00:10:20. I didn't change opacity, size, or position, the videos are about 15 seconds long but they keep disappearing. Can you help me?

[Dave_LaRonde]

We can't tell.  We can't see any of the modified and animated properties.

[Andrew Yoole]

Select the Julia layer and press UU to reveal all changed properties.  Post a pic of that please.

Also, double click on the Julia layer to open it in the layer view window. Is the black section visible in this window?