[[!Wayfinder?startId=`0`
&sortBy=`pagetitle`
&sortOrder=`asc`
&hereClass=`active`
&level=`1`
&contexts =`Context_1,Context_2,Context_3,Context_4`]]
The context names have to match exactly.
I do not know which method you utilized to create your Contexts, but simply going to the page via Wayfinder will probably not initialize the Context you are changing to, without Snippets being put in place to do so.
If you are using a Plugin, I would suggest hardcoding the links in a Chunk with each of the subdomains in it and replace Wayfinder with it.
<a href="
http://subdomain.domain.tld">Context 1</a> etc.
Just saw this in the changelog:
- [#8] Add &contexts parameter, and &startIdContext parameter if navigating across multiple contexts and using a non-0 &startId