A yellow icon appears at toggle of signal in ncsim. Cant make out what is it?
<p>I can see a yellow icon appearing at the toggle of a signal in my simulations. The icon shows a square wave like image. I tried to look up for an explanation, closest enough was "zero pulse width" but I am still unsure. No documentation explains what it is exactly and what causes it. Its not causing me any problem but I am just curious.
Does anyone have any idea ?</p>

<p><a href="https://i.stack.imgur.com/3HBrY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3HBrY.png" alt="enter image description here"></a></p>