>>>>narcissus bulb fly - I don't think so, as I've not seen the adult fly and the daffodil fronds are their usual, mature height - just absent any budding stalk.
I would not rule out the bulb fly just based on that!
The maggots feed over the winter, so you wouldn't necessarily notice in the fall at planting. The main bulbs can be mush inside and the daughter bulbs can send up normal leaves and no bloom (because they're too small/young). I do have a real problem with the fly. But I see mostly normal leaves, few blooms.
I dug up a bunch of daffs last spring where I was redoing an area --it was during bloom time (how rude of me). I ended up throwing more than half of them away because they either had a big fat maggot in them when I broke them open to see what the heck-- or signs of one. Interestingly, the nasty bulbs had no leaves, they were just down there being nasty maggot farms and the only leaves above ground were from unaffected bulbs and were normal.
//just saying
could be something else entirely, but it might be worth a check to see whatever you can see
