Search Issue Tracker

Fixed in 2019.1.X

Fixed in 2018.3.X



Found in



Issue ID




Physics simulation causes models to jitter and sometimes fly off the screen



I found this in one of the top selling assets on the asset store: there's something in their "wagon horeses" configuration that causes them to jitter a lot and sometime sthey even fly off the screen.
This doesn't happen in Unity Editor version earlier than 2018.3.0a3

Repro steps
download project or Hose Animpack asset store pack
- Open the HAP Cart Wagon Carriage scene from the _DemoScenes folder
- press play and notice the jittering

This bug was introduced in 2018.3.0a4

  1. Resolution Note (fix version 2019.1):

    This issue was caused by scripts that were changing Animator.applyRootMotion at runtime. This triggered an animator Rebind and reinitialized the state machine hence the jittering. We reworked how applyRootMotion works with the Animator bindings so that we no longer need to recreate bindings when we change applyRootMotion value.

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.