This issue is now resolved.

We have rolled out a fix for the problem. Enhanced Search Filters are now being synchronized again. We'll keep monitoring the situation and update this status page later.

We have identified the problem and are rolling out a fix to our production systems.

We are currently investigating an issue with enhanced filters not being synchronised. We have identified the underlying problem and are working on a fix. Thanks for everyone's patience and our apologies for the inconvenience in the meantime.