Refill Buffer Error while refreshing a table

Hi ShreyasMungad​  -I'd recommend first revert the column and test Close & Apply. Since the failure appeared immediately after the column replacement, that's the highest-value test. If it still fails, switch the Databricks connection to ADBC (Implementation="2.0"), because the error is occurring during the actual data transfer rather than SQL execution. Microsoft currently recommends testing ADBC for Databricks connections.

Configure ADBC or ODBC driver for Power BI - Azure Databricks | Microsoft Learn

Hope this helps.