Shadows and landscape appear and desappear in my video render.

Hello,

Im really young in the unreal production and trying to get some good result with the video sequencer in 5.5

I made my landscape, put objects and now trying to make a good renders.

The render start good, shadow, blur, everything seems correct until frame 55 (1)

at frame 56 (2) shadow from the foliage desapears.

Next, on the attachment n°3 you can see on the landscape far the difference with the attachment n°4 where a big part of the landscape is poping on screen, I tried some override game setting like on the attachment n°5 but the render is what you see on those renders.

Think it just 1 or 2 ticks to validate but, don’t know where, Thanks by advance for your help!

BN.

Bump.