# Ribbon and animtrail Bug 4.11

**URL:** <https://forums.unrealengine.com/t/ribbon-and-animtrail-bug-4-11/353391>\
**Category:** Character & Animation\
**Tags:** UE4-11, ribbon-trail, unreal-engine, bug-report, question\
**Created:** [April 8, 2016, 4:08am UTC](https://forums.unrealengine.com/t/ribbon-and-animtrail-bug-4-11/353391 "2016-04-08T04:08:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ruthless](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ruthless](https://forums.unrealengine.com/u/Ruthless)\
**Post date:** [April 8, 2016, 4:08am UTC](https://forums.unrealengine.com/t/ribbon-and-animtrail-bug-4-11/353391/1 "2016-04-08T04:08:34Z")

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hi.

we migration 4.10 to 4.11 fullsource version and testing.

ribbon and anim trail work in editor. but mobile device not working. ☹

Once one of the 15~20 times it works.

Test ios device iphone5 , iphone5s , iphone6 , iphone6s

many android device. All have the same issues.

> **[Ribbon Particle Bug on mobile iOS 4.11](https://forums.unrealengine.com/questions/401440/ribbon-particle-bug-on-mobile-ios-411.html)**
>
> MacBook Pro OSX 10.11.4 UE4 4.11 Tested on iPhone 5 and iPhone 6s Plus. I have ribbon trails simulating the engines of space ships and on missiles that work 4.10 but don’t work in 4.11. They do work in the editor but not on iOS devices. However...

i think same issue.

How do I fix the problem?

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**Author:** ![Tim\_Hobson](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tim\_Hobson](https://forums.unrealengine.com/u/Tim_Hobson)\
**Post date:** [April 8, 2016, 6:38pm UTC](https://forums.unrealengine.com/t/ribbon-and-animtrail-bug-4-11/353391/2 "2016-04-08T18:38:40Z")

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Hi Ruthless,

Currently, we have a ticket in for this with UE-29078 that will be investigated.

Thank you for taking the time to report the issue.

Tim