Data validation rule in Sap AO report missing after refresh

Hi Alll,

I am facing weird issue in AO workbook where we have maintained data validation rule using TRUNC excel function.But once I refresh the sheet it is getting disappeared from sheet. This trunc function we are using to control user for not entering more than 5 decimals.
AO version: 16.0.14026.20270

Appreciate your help.

Thanks n Regards

Mahesh