Without looking at it in massive detail a few things that stood out in the last quarter which would affect the VAS payout:
-BHP cut it’s dividend dramatically
-RIO cut it’s dividend by a fair chunk as well
-CBA’s dividend was paid 31 March rather than in April this year (so VAS paid this out in the previous quarter)
There’s probably a few others. When an index is skewed towards a few big companies the payouts can be pretty volatile.