SplineMeshActors all share the first spline placed rather than their own spline when using the mobile renderer. This was first reported in this UDN:

Steps to Reproduce
  1. Place 2 SplineMeshActors and adjust their splines so that each can be uniquely identified
  2. Select one of the mobile preview modes and notice the 2nd actor uses the first actor's spline

NOTE: Mobile GPU Scene must be enabled in the Project Settings to reproduce.

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ComponentUE - Graphics Features
Affects Versions5.3.2
Target Fix5.4
Fix Commit27508763
CreatedNov 17, 2023
ResolvedNov 20, 2023
UpdatedJan 10, 2024