When using the header builder, you cannot select a default header from the available header options, it always defaults to the woodmart header, when any are selected in the header builder admin or frontend builder.
The only way to NOW select a default header is theme settings > layout
This was never the case, it looks like the header menu default header functionality is not working…
When they fix issues on this forum, they need to start putting what they did to resolve the issue, so others can see what is required. This would save everyone and support so much time…