OceanWp – container with header menu suddenly changed to white color

Hello,

I need some help with header issue I’ve just encountered.

Suddenly a white background appeared around menu in the header despite it’s setting “transparent”. The only thing I’ve changed is adding a custom CSS to remove dotted lines around the active hamburger menu and activating Everest forms. I’ve already tried to disable the plugin and remove custom CSS, but nothing seems to solve the issue.

Screenshot: https://prnt.sc/tSxfQxeKb46K

This is the first time that I’m encountering this bug with OceanWP and I use it on 3 other websites.

EWhat could have been causing this?

Thank you!