2 ?s Why a seed? Why do some clones wilt and what do I do to bring them back?

Out of the blue i got a seed when I started with female clones and have cloned off them since I started. Never have I grown from a seed or brought anything else into my house but one of my plants the other day had a seed in the bud. it was a white seed that was useless, kinda hollow, but why did it show up?

Second, i'd say 20% of my clones when I transplant them wilt, some come back after long time, some dont. I'm wondering what I can do that is foolproof to bring them back quicker. I keep em on 24 hour of light under t5 cool bulbs but maybe i just read that they sometimes need darkness? maybe that's one thing i could do. any other suggestions

We've had to take a brief break from our grow but you can view our cloning process here. https://www.rollitup.org/grow-journals/380606-sensi-seeds-mothers-finest-indoor.html Feel free to PM any questions.

Roots grow the most at night so all clones should have as much night as possible w/o flowering, even when you normally veg under 24/0. Not having a dark period just makes rooting more difficult.

Never spray clones and try to avoid letting water drip on them. Absorbing water through their leaves discourages them from growing roots.

Always use acidic (~5.8 ) water for clones.

Every once in awhile an unfertilized seed will pop up. They usually stay white and won't grow. There's also the chance that a speck of pollen flew in from the outdoor air.

Life finds a way to perpetuate itself.