CustomObject created on v61 can't be retrieved with source tracking

[ChristianMenzinger]

Summary

Creating a new CustomObject in Summer'24 (v61) in a source tracked environment (scratch org) can't be retrieved with
sf project retrieve start

Steps To Reproduce

• Create a new scratch org with Summer'24 ("release": "preview")
• Create a new custom object in the Salesforce Setup
• run command sf project retrieve preview -> will display all changes including the CustomObject
• run command sf project retrieve start -> will fail to retrieve the CustomObject

NOTE:
the "Fullname" of the CustomObject is lacking of __c hence the error in the retrieval
see screenshot below

IMPORTANT
https://github.com/ChristianMenzinger/v61CustomObjectIssue

NOTE: empty project which only contains Layout and Profiles, which have been successfully retrieved

Expected result

CustomObject is also retrieved by CLI

Actual result

CLI throws an error Entity of type 'CustomObject' named 'TestObject1' cannot be found

System Information

zsh 5.9 (x86_64-apple-darwin23.0)

{
  "architecture": "darwin-arm64",
  "cliVersion": "@salesforce/cli/2.40.7",
  "nodeVersion": "node-v20.12.2",
  "osVersion": "Darwin 23.4.0",
  "rootPath": "/Users/christianmenzinger/.local/share/sf/client/2.40.7-bde121f",
  "shell": "zsh",
  "pluginVersions": [
    "@oclif/plugin-autocomplete 3.0.16 (core)",
    "@oclif/plugin-commands 3.3.1 (core)",
    "@oclif/plugin-help 6.0.21 (core)",
    "@oclif/plugin-not-found 3.1.7 (core)",
    "@oclif/plugin-plugins 5.0.18 (core)",
    "@oclif/plugin-search 1.0.23 (core)",
    "@oclif/plugin-update 4.2.9 (core)",
    "@oclif/plugin-version 2.0.17 (core)",
    "@oclif/plugin-warn-if-update-available 3.0.16 (core)",
    "@oclif/plugin-which 3.1.8 (core)",
    "@salesforce/cli 2.40.7 (core)",
    "apex 3.1.11 (core)",
    "auth 3.6.5 (core)",
    "data 3.3.2 (core)",
    "deploy-retrieve 3.6.8 (core)",
    "info 3.2.4 (core)",
    "limits 3.3.4 (core)",
    "marketplace 1.2.4 (core)",
    "org 4.1.5 (core)",
    "packaging 1.26.4 (user)",
    "schema 3.3.4 (core)",
    "settings 2.2.3 (core)",
    "sobject 1.3.6 (core)",
    "source 3.3.5 (core)",
    "telemetry 3.3.4 (core)",
    "templates 56.2.4 (core)",
    "trust 3.6.7 (core)",
    "user 3.5.4 (core)"
  ]
}

Additional information

[github-actions]

Thank you for filing this issue. We appreciate your feedback and will review the issue as soon as possible. Remember, however, that GitHub isn't a mechanism for receiving support under any agreement or SLA. If you require immediate assistance, contact Salesforce Customer Support.

[git2gus]

This issue has been linked to a new work item: [W-15757428] (https://gus.lightning.force.com/lightning/r/ADM_Work__c/a07EE00001rSFFaYAO/view)

W-15527739