# Particle Systems Don't Play In Reopened Levels With ES 3.1 Enabled

**URL:** <https://forums.unrealengine.com/t/particle-systems-dont-play-in-reopened-levels-with-es-3-1-enabled/465516>\
**Category:** FX\
**Tags:** particle-systems, reproducible-bug, unreal-engine, question\
**Created:** [May 20, 2020, 12:26pm UTC](https://forums.unrealengine.com/t/particle-systems-dont-play-in-reopened-levels-with-es-3-1-enabled/465516 "2020-05-20T12:26:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anonymous\_user\_3e102909](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_3e102909](https://forums.unrealengine.com/u/anonymous_user_3e102909)\
**Post date:** [May 20, 2020, 12:26pm UTC](https://forums.unrealengine.com/t/particle-systems-dont-play-in-reopened-levels-with-es-3-1-enabled/465516/1 "2020-05-20T12:26:42Z")

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I have report this issue in UE-87537. The feedback is that It cannot reproduce. But I try to the followed steps and it reproduce(UE4.25). The issue is reproduced in both editors that i use source code to build or get from epic launch. The  
Reason that it cannot reproduce maybe that in the followed 5 step, QA double click the level the particle was added to. If click the level twice, it will create the fxsystem in second click in `UEditorEngine::Map_Load`.

1. Create a new project.
2. Enable Android ES 3.1 Preview Settings.
3. Add a new particle system to a the level and save the level.
4. Open a different level.
5. Open the level the particle was added to.

Expected: The particle system doesn’t play.

Results: The particle system plays as expected.

And I try to fix it as followed, It can work.

 ![302369-未命名1589977486.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/5/8/b58719be8b26a38568859260c77919aac2a6f3aa.png)