Burger Menu Icon - suddenly appeared on desktop header

Hey guys,

once again great theme!

However i encountered a strange behavior:
Somehow a burger menu start to appear in my desktop header, any idea how to remove this?

Example:

Hello,

Can you please provide a link to your website?

Kind Regards, Roman.

Hello, I got the link, thank you.

Please try to deactivate HT Mega plugin.

Kind Regards, Roman.