ForDuration DebugDraw not clearing

Hi, so for some reason when using DebugDrawing in the Editor even when set to ForDuration does not clear and the screen gets plastered with sphere traces:

UKismetSystemLibrary::SphereTraceMulti(Self, StartTrace, EndTrace, Radius, TraceType, false, Ignore, EDrawDebugTrace::ForDuration, Results, true, FLinearColor::Red, FLinearColor::Green, 0.1f);

What’s causing this?