I found what Uncivil says ... battens binding. Lube as the first step.
Keep a spraycan in the spare winch
pocket at the base of the mast and give the sliders a whoosh before hauling it up (or in the pre-departure check). But the fumes.
And what Sandero says too. More in light air than heavy. Motoring fast to windward while dropping reduced the issue.
As some others have said, tried the downhaul, didn't like the extra line to handle and coil, and the tangle risk.
But even with lube and wind, sometimes the battens still bind and sometimes the leech end of the battens would drop first, before the luff end, and get wedged on the boom, leaving batten on a say 40 - 60 degree angle forming a triangle between the boom and the mast, and most of the main 5 meters up.
A meter or two of very light ribbon permanently tied to and flying from the leech end of the battens was a cheap
fix to enable the batten to be pulled back when this happened. The light ribbon flies by itself, and doesn't get tangled (often).
Permanently installed reefing lines on the leech soon replaced the ribbons. A tug on these always always prevented or fixed the problem, and they served two purposes.
There ya, that my nickel.