Do you think he have pollinate the others plant at this stage ?
as long as color isn't deceiving, looks like one or two nanners? can pluck them out, carefully.
If not a cluster of them, you may not have many seeds, even if it had viable pollen. Single nanners tend to produce much less pollen. Now, a whole bunch clustered together are more likely to be "complete" in an anatomical way and produce boatloads of pollen.
Before they change color, they are immature and unlikely to have viable pollen. So, better to pluck them early. Can mist with a little water before plucking, if you want to be precautious. That helps prevent an pollen from floating away as you agitate.
Check for any potential light leaks in that area of garden. Even check your light... LED can have an issue with phosphor layer that will cause a glow for hours after they turn off. Power strip timers may allow a trickle of power to flow through in some cases (cheaper ones), which will cause a glow to occur. If the ducting is right there, make sure it's not shining something down on that area after lights out...
This can be genetic and out of your hands, too. Reduce stress as much as you can. Inspect daily or as often as you can to pluck any nanners you see. In the end you may only see a handful of seeds as long as you don't get those plumes of nanners with full male organs ready to go.