I can corroborate OP’s experience, it’s basically unusable on iJ and it disconnects all the time, with catastrophic results. I just don’t use it and stick to VS Code for SSH work.
I think that was true like six months ago, but I just did it again like two weeks ago with my coworker and it has vastly improved. I had no disconnects and it was very fast the whole time.
I’m guessing it’s still not as good as VS Code, but compared to before, it’s much better.