I ran docker image push ... and the output showed repeated attempts retrying to push four layers:

c8c6a5b96e52: Retrying in 9 seconds
9cf14d3426ca: Retrying in 10 seconds
cb8245e98621: Retrying in 10 seconds
9321ff862abb: Retrying in 10 seconds

I wish it would show an error message while retrying so I would not need to guess what the problem is. There was nothing in the docker daemon logs. If I recall correctly, even when it stops retrying, no specific error is printed.

Version:

Client:
Cloud integration: 1.0.14
Version: 20.10.6
API version: 1.41
Go version: go1.16.3
Git commit: 370c289
Built: Fri Apr 9 22:49:36 2021
OS/Arch: windows/amd64
Context: default
Experimental: true