`docker manifest inspect` never match `docker image inspect` layer hashes

Description

docker manifest inspect is not reporting the layers I'm expecting...

Steps to reproduce the issue:

1. Dockerfile:

FROM alpine:latest
RUN echo "hello world" > hello.txt
CMD cat hello.txt

2. docker-compose.yml:

version: '3.3'
services:
  examplerepo:
    build: . 
    container_name: examplerepo

3. docker tag examplerepo_examplerepo myregistry/examplerepo:latest
4. docker push myregistry/examplerepo:latest
5. docker manifest inspect myregistry/examplerepo:latest

Describe the results you received:

docker image inspect examplerepo_examplerepo -f '{{json .RootFS.Layers}}'
[
  "sha256:bc276c40b172b1c5467277d36db5308a203a48262d5f278766cf083947d05466",
  "sha256:724a5698c31a82f8756d9ffd4320f3d99988f7a4fb8c1b58494845647b1a4972"
]

docker manifest inspect myregistry/examplerepo:latest
{
        "schemaVersion": 2,
        "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
        "config": {
                "mediaType": "application/vnd.docker.container.image.v1+json",
                "size": 1835,
                "digest": "sha256:a5f5d37972c23ed2bf9c4d365c9ef1c031423ef450dacf6e5c073fa604256f95"
        },
        "layers": [
                {
                        "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
                        "size": 2813006,
                        "digest": "sha256:29291e31a76a7e560b9b7ad3cada56e8c18d50a96cca8a2573e4f4689d7aca77"
                },
                {
                        "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
                        "size": 114,
                        "digest": "sha256:1864ea337d9afb159ea54debe4ee6f8dd9a8a67e7bb9ca2103b3b46a78a532c9"
                }
        ]
}

Describe the results you expected:
The layers described in the docker manifest should match the local ones, no?
bc276c40b172b1c5... !== 29291e31a76a7e560...
724a5698c31a82f87... !== 1864ea337d9afb15...

Additional information you deem important (e.g. issue happens only occasionally):
Issue is 100% reproducible.

Output of docker version:

Client:
 Version:           20.10.2
 API version:       1.41
 Go version:        go1.13.8
 Git commit:        20.10.2-0ubuntu1~20.04.2
 Built:             Tue Mar 30 21:24:57 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.7
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       b0f5bc3
  Built:            Wed Jun  2 11:54:58 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.6
  GitCommit:        d71fcd7d8303cbf684402823e425e9dd2e99285d
 runc:
  Version:          1.0.0-rc95
  GitCommit:        b9ee9c6314599f1b4a7f497e1f1f856fe433d3b7
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Output of docker info:

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
  compose: Docker Compose (Docker Inc., v2.0.0-beta.6)
  scan: Docker Scan (Docker Inc., v0.8.0)
WARNING: Plugin "/usr/libexec/docker/cli-plugins/docker-app" is not valid: failed to fetch metadata: fork/exec /usr/libexec/docker/cli-plugins/docker-app: no such file or directory

Server:
 Containers: 39
  Running: 5
  Paused: 0
  Stopped: 34
 Images: 335
 Server Version: 20.10.7
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc io.containerd.runc.v2 io.containerd.runtime.v1.linux
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: d71fcd7d8303cbf684402823e425e9dd2e99285d
 runc version: b9ee9c6314599f1b4a7f497e1f1f856fe433d3b7
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 4.19.104-microsoft-standard
 Operating System: Docker Desktop
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 24.95GiB
 Name: docker-desktop
 ID: 2425:OVZV:VQ2Q:XKXW:7L4U:IMRJ:CX5X:36QE:RXOE:JLDJ:7COV:SX5A
 Docker Root Dir: /var/lib/docker
 Debug Mode: true
  File Descriptors: 76
  Goroutines: 73
  System Time: 2021-08-11T16:27:28.0945286Z
  EventsListeners: 4
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled

Additional environment details (AWS, VirtualBox, physical, etc.):

• Using AWS ECR
• Building in Windows10 WSL2

提供された Dockerfile、compose ファイル、レジストリイメージ、バージョンの詳細を使用して、報告されている docker manifest inspect および docker image inspect コマンドから始めます。マニフェストのレイヤーダイジェストをローカルの RootFS レイヤー値と比較し、その差異が想定されたものかどうかを判断します。この再現について、動作が説明または修正され、検証されれば完了です。