I started a new Time Machine backup last night and enabled the third-party app Amphetamine to keep my machine awake for 9 hours. When I returned in the morning, it appeared that my MacBook went to sleep after those 9 hours, but Time Machine still read "Encrypting...".
Is my Time Machine okay, or do I need to wipe it and start again?
After this, I ejected the Time Machine drive and plugged the it back into my Macbook when I got to work. It backed up a new 500 MB of files and went back to encrypting. This makes me think that perhaps Time Machine dealt with the MacBook going to sleep fine, but I want to make sure.