Backoff delay duration less than minimun value

I/flutter (22850): fM-7nvr1QVU
I/flutter (22850): download url=https://r2---sn-uphho-gboe.googlevideo.com/videoplayback?expire=1548715101&itag=140&keepalive=yes&requiressl=yes&ei=_S9PXNCuIKq4owOE_LbQDQ&pl=24&mime=audio%2Fmp4&id=o-AJRfzTnDCLzSYSkPNys-5Kr8XhuWZhkfvP-R026xZ71I&ms=au%2Crdu&fvip=3&mv=m&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&mt=1548693408&mn=sn-uphho-gboe%2Csn-30a7rn7z&mm=31%2C29&ip=65.18.120.148&gir=yes&key=yt6&ipbits=0&lmt=1541140746832930&txp=3533432&c=WEB&dur=198.251&clen=3209191&initcwndbps=187500&source=youtube&signature=AB349683662325AD53F2FEE9B39A9A4A60055424.9D51829BD4248011B9911F4244205D42C3013AFB
W/WM-WorkSpec(22850): Backoff delay duration less than minimum value
I/flutter (22850): Download task is enqueued with id(a29b6b9f-c688-4b95-8cbe-20ff4c864a05)
I/WM-WorkerWrapper(22850): Worker result RETRY for Work [ id=a29b6b9f-c688-4b95-8cbe-20ff4c864a05, tags={ vn.hunghd.flutterdownloader.DownloadWorker, flutter_download_task } ]

The report names Android WorkManager and DownloadWorker but no source file or test. Start by reproducing the logged retry behavior and tracing the DownloadWorker scheduling path; the desired backoff behavior and a concrete completion condition need clarification.

Written by the indexing model from the issue text.