Hi Robert,
It’s a strange issue. When I attempt to replicate on a multisite network – even with domain mapping rather than sub-domain/sub-directory style URLs – I don’t see the problem.
Additionally, we know that we have a number of users out there who also have domain-mapped multisite networks and I’m not aware of this being an issue that others have raised – this all points to some sort of local, site-specific issue.
In light of that, I’m not sure how much further we’re going to be able to go on this one. I did want to suggest one further set of testing steps you could follow, however:
- Can you set up a test environment (adjusting your hosts file would allow you to access the test site using the same domains as you have in production)
- Starting with no other components but those necessary for domain mapping plus our own plugins, set up a similar range of sites
- Are you able to replicate the same issue with the main events page on the primary blog as you can do in production?