In Material OVP, you enabled Classification UIBB to govern the Classification Class and Characteristics. You will find that the Classification UIBB is always collapsed automatically after clicking check or refresh if you have changed any field in the Material UI. The UIBB is also collapsed automatically even you've expanded it before you make the change.
SAP Master Data Governance
Classification UIBB, Collapse, Lean Classification , KBA , CA-MDG-APP-CLF , Classification , Problem
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