Hi Alex,
I have seen this before. Can you please try a few things for me?
- Click into any of the affected cell's formula bars at the top and press enter. See if the cell is updated.
- Hit F9, which is the default "recalculate all formulas in workbook" hotkey and ensure all values update
Also please go to File>Options then navigate to the formulas tab and ensure the first option under Calculation Options, Workbook Calculation, shows that the Automatic radio button is selected.
Please let me know if your issue persists.
Thanks,
EBW