I had just finished a VIP mission in the cosmodrome's breach to find another mission popped straight up. It was unreadable as all question marks. It slowly started decoding into letters but had already worked out was kill enemies. After killing enough enemies it changed to a different mission this was generate orbs and after that it changed again. This time into opening loot caches. I completed this and got no rewards. However the walker spawned as I finished this. Could this be the reward starting a public event? Has anybody else had this yet or similar? Have you gotten any rewards or got a public event straight after?