Tablet menu changing grey after opening submenu

Hi there,

Our nav bar is styled with clear frosted glass. When we open the hamburger menu on a tablet, the nav bar becomes a different colour (grey). When we close the hamburger, the nav bar stays that colour (grey) instead of returning to its default colour (clear frosted glass). We were wondering why this may be happening and if there are any solutions to this problem. Thank you in advance for any help!

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I have seen some div setting issues. Go to tablet mod and open hamburger menu.
Check the screenshot and change the setting accordingly.

Let me know if any help required.