I had a similar scenario with IO-470s that would quit at idle on the roll
out. Windmilling on short final kept them running. Turned out the fuel
pressure was too high from the engine driven fuel pump at idle, and the idle
mixture was too retch. (boost pump off)

It might have quit in the same way yours did, but standard technique is to
keep a few inches of power on until just over the threshold (otherwise sink
rate was too high) , so there were no opportunities to quit.

It does get your attention.