What you were expecting to happen, and what actually happened?
My guild had many tasks completed in a short period of time. Should have gotten plenty rewards, but only got fraction. For example, should have gotten about 400 glory keys, but only got 60. Same with other rewards. At least one other guild member reported similar experience.
What are the steps to make it happen again?
Not sure. Could be that when too many tasks complete before you collect them, you only get the most recent ones and lose the first ones. Another possibility is that if I invaded without collecting task rewards first, previous rewards are lost.