Aloha, Brah.

I don't wish to alarm you, but Those little white dots and tiny wisps of silk on the top leaves might be signs of spider mites.:cursing:
I'm in no way an expert, so ask Stinky before you take any action.

If this is, indeed, the case, I've read that laying a "No-pest strip" on the soil and covering the plant with a large garbage pail to hold the vapors in overnight, will kill the adults. Repeat every 3 days, 3 times at least, and you kill the new-hatch as well.
Hope this is not the case with you.
The lower fan leaf shrivel and fall looks normal, if a little early.

Mahalo for the rep.

Best
Weezard