Skeletal meshes with cloth will disappear at the edge of the viewport. If timed right (hard to repro, you can see it flicker repeatedly.
The cloth will disappear.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-40407 in the post.
|Component||UE - Simulation - Physics - Character|
|Affects Versions||4.14, 4.15|
|Created||Jan 10, 2017|
|Resolved||Apr 4, 2017|
|Updated||Apr 27, 2018|