multisite – Multsite: Facebook returns the wrong site in the preview

I have several sites in a multi-site installation. The main site of the network is Then I have sub-sites:, and

When I write in a post on Facebook, Facebook creates a preview for that site.

However, when I type, I get a preview of, the main site of the network.

The only difference I can see is that has Yoast installed and the OpenGraph metadata is enabled for it. I disabled the OpenGraph part, but this did not seem to solve the problem. However, I know that Facebook sometimes caches previews, so I'm not sure I solved the problem or not.