waagent failing with custom-script-extension: Text file busy

[jpveritone]

'm running an azure govcloud environment with many VMSS using the CIS RHEL 7.9 image. About 70% of the time my extension scripts fail to run and looking in /var/log/waagent.log see the error
The handler for VM extension type 'Microsoft.Azure.Extensions.CustomScript' has reported terminal failure for VM extension 'fastcore-proxy-MSILinuxExtension1' with error message: '[ExtensionOperationError] Non-zero exit code: 1, /var/lib/waagent/Microsoft.Azure.Extensions.CustomScript-2.0.7/bin/custom-script-shim install [stdout] + /var/lib/waagent/Microsoft.Azure.Extensions.CustomScript-2.0.7/bin/custom-script-extension install /var/lib/waagent/Microsoft.Azure.Extensions.CustomScript-2.0.7/bin/custom-script-shim: line 77: /var/lib/waagent/Microsoft.Azure.Extensions.CustomScript-2.0.7/bin/custom-script-extension: Text file busy [stderr] '. 'Install handler failed for the extension. More information on troubleshooting is available at https://aka.ms/VMExtensionCSELinuxTroubleshoot'

Googling for answers I found many experiencing same issue on CentOS. The microsoft repo (rhui-1.microsoft.com) I'm using is allowing me to only set version 2.2.46.

Is there a known version of waagent that fixes this problem on RHEL 7.9 and if so any documentation on how I could install that particular version?