Please replace your code with below code in you base.css file.
.section-header .header-wrapper {
–mask:
radial-gradient(13.99px at 50% calc(100% - 19.20px),#000 99%,#0000 101%) calc(50% - 24px) 0/48px 100%,
radial-gradient(13.99px at 50% calc(100% + 7.20px),#0000 99%,#000 101%) 50% calc(100% - 12px)/48px 100% repeat-x;
-webkit-mask: var(–mask);
mask: var(–mask);
margin-bottom: -19px;
}
.section-header.menu-open header-wrapper {
–mask: unset!important;
}
I hope menu drawer will working.
Let us know the result after adding the given code.
Thankyou 