Demo "Reset" button bug

What information was incorrect, unhelpful, or incomplete?

When the user alters a line of demo code in an example, the "Reset" button is enabled. If the user clicks to reset their changes, the button continues to be active despite a lack of difference between the line's current text and the line's original text.

What did you expect to see?

It would be more precise to disable the button again until any changes are made once more to the demo code. It may be the case that the button disables itself briefly, but then re-enables itself immediately after, perhaps indicative of a logical error (though this may be my visual misinterpretation).

Do you have any supporting links, references, or citations?

See the "Reset" button in any "Try it" demo. Here is one example:
https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/animation-direction#try_it

Do you have anything more you want to share?

Note that this does not occur in the playground.