动画蓝图开启RootMotionFromEverything，使用Motion Matching节点，当BlendStack中的AnimPlayers数量大于1时，且动画处于blend的状态，会出现肉眼可见的滑步现象（位移过慢）。
跟进了代码怀疑是bug（也可能是设计如此），先前在github上提了一份pr兼issues，里面包含了分析过程和示例日志，担心等待回复太久因此在这里请求支持。
Hi,
Thanks for reporting this issue. It does look like this is a bug in the Blend Stack node.
The fix described in the pull request appears to be correct. However, I would go with a slightly different implementation.
Existing code:
`const float BlendInPercentage = bIsLastAnimPlayers ? 1.f : AnimPlayer.GetBlendInWeight();
const float AnimPlayerBlendWeight = CurrentWeightMultiplier * BlendInPercentage;
FAnimationUpdateContext AnimPlayerContext = Context.FractionalWeightAndRootMotion(AnimPlayerBlendWeight, AnimPlayerBlendWeight);
UpdateSample((AnimPlayerIndex == 0) ? AnimPlayerContext : AnimPlayerContext.AsInactive(), AnimPlayerIndex);
CurrentWeightMultiplier *= (1.f - BlendInPercentage);`Fixed code:
`const float BlendInPercentage = bIsLastAnimPlayers ? 1.f : AnimPlayer.GetBlendInWeight();
const float AnimPlayerBlendWeight = CurrentWeightMultiplier * BlendInPercentage;
FAnimationUpdateContext AnimPlayerContext = Context.FractionalWeight(AnimPlayerBlendWeight);
UpdateSample((AnimPlayerIndex == 0) ? AnimPlayerContext : AnimPlayerContext.AsInactive(), AnimPlayerIndex);
CurrentWeightMultiplier *= (1.f - BlendInPercentage);`This effectively does the same thing as mentioned in the pull request.
I’ll discuss with the dev team about getting this change integrated.