What is the problem?
When printing from an SD card, OctoPrint never sees that the job is completed and never goes back to the "Operational" state without manual intervention (usually a disconnect and reconnect will fix it). It stays at "Finishing," but never gets word that it's finished.
The third-to-last line in the serial log (see below) shows a transition from "Printing from SD" to "Finishing," when it should probably switch to "Operational" instead.
Additional information about your setup
OctoPrint version: 1.3.10
OctoPi version: n/a (running OctoPrint on ARM64 Gentoo on a Raspberry Pi 3)
printer: Anet A8
firmware: Marlin bugfix-2.0.x 9562a02
serial.log: posted at https://home.alfter.us/s/AseGGJamNtCRZHo due to length