Either side of a knock of 179 last week, Bavuma has got out to off-spin three times in three innings – all for single-figure scores.
After a shocking start, a bad call at the toss compounded by a wayward bowling performance across the first two hours, Australia roared back into the Test in the afternoon.
Cummins' entry into that unwanted club has been delayed by his bowlers' streetwise nature and ability to sense a moment.
The end result does not prove Cummins was right with his morning decision, however.
But Cummins' Australia held firm again where other sides have folded.
Somehow, after everything, if either side is happy, it is Australia.
But Australia find a way, often when teetering somewhere near the brink.
Eleven overs later, Lyon was bowling his spin.