Problem with rendering of 20th frame in Movie Render Graph (UE5.5.3)

Development Rendering
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1

Hello, colleagues!

Encountered a problem with rendering in Movie Render Graph: starting from the 15th frame, the rendering time increases by 2-3 times, and on the 20th frame the process is almost stopped (formally it continues, but takes an incredibly long time).

Scene details
Renderer object: character only (without background).
Lighting: 4 Rect Light sources.
Character: hair without simulation, clothes without simulation, SSS-skin.
Renderers mode: tried Lit, Unlit, Path Tracer - the problem is the same for all.

GPU: RTX 4080super
CPU: Intel Core i9-13900k
RAM: 48GB DDR5

Has anyone encountered a similar problem or knows what it might be related to? I would appreciate advice!

image
image1279×749 245 KB

*Example of render. Temporal Sampling = 1 & Spatial Sampling = 1, FullHD.

2

Does this only happens with MRG and only in that layer? When you are rendering you can hit the tilda key to get a command prompt and try and profile the GPU to see whats happening.

If you go into PIE and play the sequence does the editor stall out in the same frames?

3

Only in MRG and on all layers (the unlit gets stuck after 22).
I’m not checking about the GPU right now, but I’ll post the results later, for now

the solution was to roll back to 5.4