FWIW,
I'm running version 2020.09.29 of the rclone plugin with absolutely no issues on 6.9 RC2. Been running for months. I don't know if this is the most recent version of the plugin or not but it kinda doesn't matter.
You can update rclone from within the plugin so.....ya, this is great!
Also worth mentioning, I don't recall exactly if this is what I did...but I believe I had this version of the rclone plugin installed prior to updating to any 6.9 release. Then upgraded to 6.9. Again, no issues.