Latest, when the original deadline passes, either the "try validation" button appears or the validation is pushed by token of the event that checks if an additional copy is needed. It's a bug for which there never was found the cause. Running a script to check the validation queue flagging too costly in load addition to run one on top, so the Try Validation was created, which itself occasionally does not appear.

It's that [funny] article I saw and cross posted in the quota thread [from the mother of all projects] claiming that user systems were too fast these days for the servers to be able to keep up at the transactional volume processed, and thus requiring the quadruple size up of tasks and here at WCG getting fire and flame when 20-40-90% ** is added to a task to prevent collapse of the scheduler. Suggest to be patient. The validators will get to them eventually.

Edit: ** Noting that this size-up was reversed after the cause of the server slow-downs was uncovered and fixes implemented [the over-sized directory structure and core memory size were a few of them]!