RD Gateway Credentials Prompt When Trying To Reconnect
This problem happen when you have RD Gateway configured with some credentials and you use the reconnect action. You get prompted for the RD Gateway credentials and the application does not reuse the existing settings.
To fix this issue, set the Reconnect mode to Full in the RDP session Advanced settings. This will force the complete disconnect/reconnect and it will resolve the issue.
Full Reconnect In Advanced Tab