When a table in a mobile dashboard is expanded, columns that were renamed in the report are displayed in their original forms (the field names in the model). This only happens in the mobile dashboar...
To reproduce:
1. Rename the table column and republish the report to Power BI Service
2. Pin the table to dashboard
3. Create a mobile view for the dashboard
4. On Power BI mobile app (tested with Android phone), the dashboard will display the new column name (this is correct and expected behaviour).
5. Click on the table tile in the dashboard to expand it, the column will display the original name.