We have successfully re-synced all affected Data Sources and the connections are now stable again.

We have resolved the issue and have initiated a sync to re-sync all affected Data Sources. This can take up to a couple of hours to complete. We will post an update once this is done.

We are experiencing syncing delays for all Basic and all Custom metrics for Facebook, Facebook Ads and Google Ads. Connecting new Data Sources works fine. We are already working on resolving this asap.