This is an ongoing issue with the domain mapping plugin.
All mapped domains show a health status of Invalid even though the sites and domain mapping functionality work perfectly fine.
Why is it that the health status is showing as invalid when the domains are pointed to the correct IP and are clearly propagated normally. Where is the domain mapping plugin looking up the domains that its getting an invalid status ?
We had to disable the "Check DNS Settings" and "Domain propagation health" as users were never able to map their domain with it enabled.
This used to work fine then one day a couple of weeks back it just stopped.