List the currently saved remote desktop saved credentials
cmdkey /list:TERMSRV/*
Delete the credential you need to work.
cmdkey /delete:TERMSRV/<targetNameOrIp>
Re-add the credential as a generic credential.
cmdkey /generic:TERMSRV/<targetNameOrIp> /user:<username> /pass:<password>
Passwords saved through the RDP UI end up as “Domain” type credentials and aren’t compatible with CG. Passwords saved through cmdkey /generic flag ends up as “Generic” type, and DO work with CG enabled.