Hi,
It seems the issue has been around for a while.
https://github.com/MicrosoftDocs/windows-powershell-docs/issues/139
Please check to see if this fixes the PSReadline module.
https://devblogs.microsoft.com/powershell/updating-help-for-the-psreadline-module-in-windows-powershell-5-1/
Best Regards,
Ian Xue
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