Curious if this is true or not, I hear this mentioned every so often as a reason why PVP queues are bad during off-hours:

Premades can hog the queue in Frontlines, like let's say Maelstrom on Primal data centers. Theory is that during times when it's 24-person only matches (majority of the day that isn't peak PVP time), the premade of 8 constantly gets into new matches because there are not 8 people queued up solo at that time. As a result, the 7 or less solo queue people are locked out until an eighth person queues up. Those 8 people then have to remain queued until the match slot opens up, so if even one person drops queue, the premade will still get in right away. Essentially this keeps happening and you never get 8 people queued during the small window when a new match is ready for participants. Once you hit peak hours with enough people queuing, this no longer is an issue.