"Invalid distribution account" hold is placed on the invoice but the distribution accounts are valid

Issue :

An hold  "Invalid Distribution Account " have been placed on an invoice ,when checking the accounts all looks fine and enabled. Executed the payables approval program but the hold was not released. (Note  : The payables approval Program will run everyday with default parameters)

But after some time the invoice got validated and the hold was released.

Can anyone advise on how this could happen?(There was no change in the GL code combinations).

Also whether the payables approval program looks for the invoice falling in the same period when the program is executed.