The Niagara System doesn't update the mesh renderer If the Static Mesh is changed to an Imported Mesh in the source emitter
Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5470758
After compiling and saving the emitter with a new mesh it will not update the system even if it is deleted and re-added to the system
The Niagara System would be updated
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-71814 in the post.