When you import the site settings file in Career Site Builder, the system deletes some of the fields in the XML file such as IDP configuration and ICS flag which causes ICS to be disabled.
SAP SuccessFactors Recruiting Marketing
Correction is scheduled to be included in release 2H2022
Workaround : Metadata regeneration and establishing a new connection with IAS in RCM is required in order to sync again.
KBA , LOD-SF-RMK-CSB , Career Site Builder , Known Error