During the migration process, migration worker retries X times and you see 99 or 100 percent is completed. But, the migration hangs and it does not finish.
Issue is fixed in version 220.127.116.11. Please contact Support for the download link.
Message offset number may vary.
The correct parameter designed for disabling the timeout is DoInactivityTimer=0 under [General] section. If you have a wrong value such as InactivityTimer=0, you may continue to see Retry X of (10).