Problem with multiple instances of WinSCP and key-based authentication
When using WinSCP with key-based auth it's not possible to have multiple instances open. It seems that, when you try to open the second instance, the temp file with the private key is not correctly generated. Then WinSCP gives back an auth error. See the video for further details.
2020-10-06 10-30-34.mkv
Hello,
Would you be able to duplicate those 2 sessions (Right-click -> Duplicate) and then give it a try again by changing the session engine to Built-in SCP in order to see if the issue persist? 

Best Regards,
Etienne Lord
builtin.jpg
dup.jpg
With built-in SCP it doesn't happens but with "built-in SCP" it doesn't create temp key files on user temp folder. The issue with WinSCP seems coming from this fact.
Hello,
Are you alright with using the Built-in SCP?
Best Regards,
Etienne Lord
No, definitely not. WinSCP is far user friendly and complete with additional features that built-in SCP doesn't has.
Hello,
Understood, I will check what can be done about that.
Best Regards,
Etienne Lord
Hello,
I got a ticket open with the engineering department, they will look into it!
Best Regards,
Etienne Lord
Hello,
We've figured out what the issue was and made a fix. This fix will be available with RDM 2020.3.8.0.
Regards,
Hubert Mireault