Overriding an instanced Prefab material doesn't work as expected

Summary

Overriding a material from a prefab works in editor but reverts back to the default mesh material in edit/game sessions. Not everytime but consistently enough to be a problem. Wasn’t able to spot a pattern.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Scene Graph

Steps to Reproduce

  1. Create a prefab with a at least one mesh component
  2. Change the default material from that mesh component
  3. Place the prefab in the level
  4. Override the mesh component material

Expected Result

In game prefab should respect the overriden material

Observed Result

In game prefab reverts the overriden material to the engine default WorldGridMaterial

Platform(s)

PC

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Additional Notes

Blue is prefab A with default values
Red is prefab B with overriden values (in editor)
Grey with yellow cog is how prefab B shows in edit/game sessions

FORT-1113679 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.

When im spawning a prefab its reverting to the world aligned grid material ?