If you’re blending animations, the notifies from all the contributing animations can be triggered. So if you blend a walk and a run which have notifies for footsteps, you may find that each footstep notify gets triggered twice. There is a solution in the properties of the blendspace: set “Notify Trigger Mode” to “Highest Weighted Animation”. See this question on the AnswerHub for more information: https://answers.unrealengine/questions/51252/animnotify-calling-both-run-and-walk-at-same-time.html
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