Even when it works I have to wait a few seconds for the mouse cursor to change.
This is how it is supposed to work. You should allow the program 1-3 seconds before it receives a response from the Host and finish the operation. Performance usually depends on the kind of connection used - on a LAN it should be faster that when using the Internet-ID.
Yes in the exact same condition. Drag and drop the same file from local user desktop to remote user desktop. It worked only after 5 tries. I also tried with another file that I never manager to drag and drop successfully because I gave up after 10 retries.
It is hard to figure out exactly what might be causing this behavior. I can only say that our team is going to revamp the code related to dragging and dropping and make it more robust and feature-rich.