On my machine, I can reproduce this rather reliably. I’ve packaged up the test environment I’ve used - hopefully you’ll be able to use it to reproduce on your end.
How to use the package I’m sending: You should start with a blank Blueprint-only project with the starter content included and add InfinityBladeFireLands assets to it.
Add the contents of the rar file to that project. Namely:
- Content/Dialog.umap (which should also be set as your default map),
- /Content/Lighting.umap (a lighting level who’s _data I’ve deleted, I assume you can rebuild this)
- /Content/Sublevels/SubLevel1.umap … SubLevel4.umap
- A replacement for InfitiyBlade/Maps/Forge.umap (and 3 duplicates) located in /Content/Add_To_InfinityBlade
Once this is built and packaged, you should see a tower of benches and chairs surrounded by 4 Forges. When run it will auto-record a replay called ‘ChairsReplay’ and start sliding a chair across the floor. If you then DemoPlay it, the error presents itself.