Hi there,
its this CSS you have in the Customizer > Additional CSS:
.entry-content a:not(.button) {
box-shadow: inset 0 -1px 0 currentColor;
transition: color 100ms ease-in,box-shadow .13s ease-in-out;
}
.entry-content a:not(.button):focus, .entry-content a:not(.button):hover {
box-shadow: inset 0 0 0 currentColor,0 3px 0 currentColor;
}
replace it with:
.entry-content p > a:not(.button) {
box-shadow: inset 0 -1px 0 currentColor;
transition: color 100ms ease-in,box-shadow .13s ease-in-out;
}
.entry-content p > a:not(.button):focus, .entry-content p > a:not(.button):hover {
box-shadow: inset 0 0 0 currentColor,0 3px 0 currentColor;
}