Hi MoyaL_001,
Thanks for posting in the community.
According to your description, my understanding is when you refresh the Pivot table, it will removes the newly added data from the source table. If so, may I know if the situation exists in a specific workbook or also in a newly created workbook?
If the issue only exists in a specific workbook, I would like to suggest you share the workbook with us. You can use test data to replace, upload it to the online drive and share the file link with us.
If the issue also exists in a newly created workbook, please try the following suggestions and check if they help.
1. Please try to update Office to the latest version, then check again.
2. Please set Excel into Safe Mode, then check if the issue still exists.
Close Excel, press win + R, in the Run box, type excel /safe, and click OK
3. Please try to Repair Office and choose Online Repair. After that, run Office applications and check again.
If the issue still exists, I would like to collect more information.
Please provide your Office version
Click File> Account, please take a screenshot including Subscription Product and About Excel
If my understanding conflicts with the situation or you have any updates, please feel free and come back to share with us.
Regards,
George
