There's a penalty if you withdraw three times, so I doubt it is intentional for the most part. DPS are almost always the last to commence their queues because they are away so often while waiting. More often than not, they miss the queue while doing something else. It also almost always repops instantly when this happens since there is usually another DPS waiting for their turn to pop up.

All other possibilities are likely rare occurrences, but when combined throughout the day can it make it seem like something is up with the DPS in queues. But I assure you, they are not fans of missing them.