Description

This is a regression introduced by the particle system manager. It does not account for the owning actor's time dilation when ticking the particle system components. 

Steps to Reproduce
  1. Create a new particle system
  2. Create a new actor
  3. Add a particle system component to the actor
  4. Set the particle system component's template to the system from #1
  5. In the actor's construction script set its custom Time Dilation to .1
  6. Place the actor in a level

RESULT

The particle system will simulate as if the time dilation were 1.0.

NOTE: If you disable the particle system manager with the command  "fx.PSCMan.Enable 0" it will simulate at the owning actor's time dilation. 

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-88322 in the post.

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Fixed
ComponentUE - Niagara
Affects Versions4.224.234.24
Target Fix4.25
Fix Commit11294253
CreatedFeb 7, 2020
ResolvedFeb 7, 2020
UpdatedSep 19, 2021