Mobile nav icon bug

Hi,

I’d like to just report a tiny bug on the mobile nav icon.
When you click on the menu icon, it expands the menu, and the menu icon turns dark. However, when you click the icon again, the menu shrinks, but the menu icon is still dark, instead of turning back to the original color.

Here are some screenshots:
1. Before clicking on menu icon (https://yumasax.com/images/nisargbug1.png)
2. Clicking on the menu icon, turning the icon dark (https://yumasax.com/images/nisargbug2.png)
3. Clicking on the menu icon, again – this should turn it back to white, but it doesn’t (https://yumasax.com/images/nisargbug3.png)

It would be great if the icon color flips back when shrinking the menu. Thanks!
Also, do you recall where in the code this logic is handled?

Best,
Yuma