Operations into Campaign Glitch?

I loaded into a quick match operations and immediately was given a cutscene with Titus and Co.

I loaded in and checked the mission name, and it was Voidsong (a campaign mission).

As a Heavy, I could pick up any weapon, use melee weapons etc.

We got quite far until you get to a part you need a jump pack, at which point the game locked the 3 of us (randoms) together in a courtyard, where all 3 of us left.

It was really fun, but inevitably pointless and a waste of time as leaving meant 0 xp.

Is this a common bug??