Only got 4 packs from the Arena REQ Bundle

I purchased the Arena REQ Bundle last weekend, and I only ever received 4 packs from it. I got two from the day I bought it, and two from a few days later the next time I logged in. But for the past three days, nothing has been showing up in my game or on Halo Waypoint.

I’ve experienced the Warzone REQ Bundle before, so I know how this works, but these packs now have just stopped appearing.