Department from CRM not updating in ECC

Hello all,

We have a scenario: When we change or remove department code from Contact Person in a Corporate Account, it does not gets updated in ECC.

In ECC in XD03->Contact Persons tab ->choose a contact for which value is changed in Webui should be updated in Contact Person in ECC.

Kindly let me know where to look or debug. The BDOC is all Green, no errors reported. No queue is stopped.

Thanks,

Pradeep