Data Policy exception : The following fields are mandatory : comments

[PriyanshuVerma1]

There is a data policy applied on sysapproval_approver table to make comments mandatory when approval is rejected.

There is an ui action button : reject.

Whenever I fill the comments and hit Reject button I get the data policy exception but still it gets updated and approval is rejected. Attaching the screenshot below

I am not able to understand why I am getting the error even though condition of data policy is fulfilled. Also if I change the state to rejected from requested and fill the comment field and use save instead of reject button I won't get the error message. Same way if I did this with UI policy instead of data policy I am not getting any such error. 

[PriyanshuVerma1]

AI is also not able to explain the error message. I checked on the ai too. There is nothing relevant i could find

[Admin7267]

@PriyanshuVerma1 Did you have solution for this case?

[PriyanshuVerma1]

No actually. We dropped this for time being.

[Sohail Khilji]

the execution time of data policy and comments getting added are varying this must be the reason...