for the log, add -vv to the command. post the entire output
i am not sure i understand the exact issue.
can you explain in detail, perhaps with a real example of a real command, real filename of a real file not being copied, etc...
the documentation might be a bit confusing.
"when source:path is a directory, it's the contents of source:path that are copied, not the directory name and contents."
so try rclone copy /home/user/FOLDER /home/user/onedrive/FOLDER --progress
are you using rclone mount or what?
fwiw, rclone can copy from ftp to onedrive, no need for local mounts. rclone copy ftp:FOLDER onedrive:FOLDER --progress
if you are using ftp, best to update, many bug fixes since that old version you are using.