I updated the metadata for this book, it only renamed the first file and then stopped.

Jul 03 09:01:39 bookorbit node[16679]: {"level":30,"time":1783087299504,"pid":16679,"hostname":"bookorbit","req":{"id":"req-3b8","method":"PATCH","url":"/api/v1/books/521/metadata-and-locks?syncFileWrite=true"},"context":"FileWriteService","msg":"[file_write.write] [end] bookId=521 format=mp3 triggeredBy=sync userId=1 dryRun=false durationMs=9695 status=success fieldsWritten=14 - file write completed"}
Jul 03 09:01:39 bookorbit node[16679]: {"level":30,"time":1783087299504,"pid":16679,"hostname":"bookorbit","req":{"id":"req-3b8","method":"PATCH","url":"/api/v1/books/521/metadata-and-locks?syncFileWrite=true"},"context":"FileRenameService","msg":"[file.rename] [start] bookId=521 userId=1 force=false - file rename started"}
Jul 03 09:01:39 bookorbit node[16679]: {"level":30,"time":1783087299525,"pid":16679,"hostname":"bookorbit","req":{"id":"req-3b8","method":"PATCH","url":"/api/v1/books/521/metadata-and-locks?syncFileWrite=true"},"context":"FileRenameService","msg":"[file.rename] [end] bookId=521 userId=1 durationMs=21 status=success oldPath=\"/books/Clayton M. Christensen/How Will You Measure Your Life_ (2012)/How.Will.You.Measure.Your.Life-Part01.mp3\" newPath=\"/books/Clayton M. Christensen/How Will You Measure Your Life_ (2012)/How Will You Measure Your Life_ - Clayton M. Christensen.mp3\" - file rename completed"}
Jul 03 09:01:39 bookorbit node[16679]: {"level":30,"time":1783087299551,"pid":16679,"hostname":"bookorbit","req":{"id":"req-3b8","method":"PATCH","url":"/api/v1/books/521/metadata-and-locks?syncFileWrite=true"},"context":"BookService","msg":"[book.update_metadata_and_locks] [end] bookId=521 durationMs=9773 scalarFields=8 customMetadataUpdated=false lockFields=0 - metadata and lock update completed"}