SFDX-CLI Bug with sfdx:mdapi:convert command

This repo is to demonstrate a bug with the sfdx force:mdapi:convert command not converting CustomLabels.

Tested and recreated in the following

Windows 10/11

• sfdx-cli/7.151.1 win32-x64 node-v14.19.1

Ubuntu 20.04

• sfdx-cli/7.151.1 linux-x64 node-v14.19.2

Issue: sfdx force:mdapi:convert does not convert CustomLabels to source format.

Steps:

• convert original source to mdapi format sfdx force:source:convert -r force-app -d mdapi
• observe CustomLabels in mdapi folder and package.xml
• convert MDAPI back to SOURCE format sfdx force:mdapi:convert -r mdapi -d src
• observe NOTHING was converted, \src folder is empty
• Use legacy mdapi:convert sfdx force:mdapi:legacy:convert -r mdapi -d src2
• Observe legacy convert works as expected in \src2 folder