the result of the behaviour is on the screenshot.
This is a simple spreadsheet. calculations are basic arithmetic no formulas beyond SUM.
Sometimes does not show the calculation or result, sometimes It shows the result of the calculation but not the calculation other times it looks good. And yes it is random, if i close the sheet and open it again the issues appear on different parts of the sheet.
If required i can try to sanitize the sheet and replicate the issue on that ‘clean’ version for you to reproduce.
This is on the ecloud on the cloud version (not self-hosted)