Failed because: Error: tus: failed to upload chunk at offset NUMBER

[juloliveira]

I´m testing tus-js-client with tusd.
The tusd is running in Ubuntu Desktop 16.04 in Virtualbox and tus-js-cliente demo in Windows host with Firefox. I put the tusd in a AWS EC2 server and the same error occour.
The tusd is configured with parameter -s3-bucket,
All works fine, but an error always happen in upload process in big files (~ 300Mb). When click in "Ok" the process continues but after some minutes the error occurs again.

"Failed because: Error: tus: failed to upload chunk at offset 62914560
Do you want to retry?"

After many click´s in "Ok" button, the upload is completed and file is correct in AWS S3

What might is happening? How might I discover wher is the problem?