I have had a similar problem occur 2 times. Have used the scheduled charging and departure times exclusively for the last 1 year. I spoke to Ford and they were aware of the problem and said it would be corrected in a future software update.
What I found was that the missed charging would...
Took a couple of dirt bikes out trail riding in the woods. The smaller one is a Surron electric trail bike and I was able to charge it on the way there and on the way back with the pro power in the bed. Worked out great