The run time expects to receive RunCommand when the run closure is about to start executing. Then receiving the completion notification when the run finishes running. This is how it is implemented in all SDKs (typescript, python, etc..) but not how it happens in rust.
In rust both the command and the notification are received when the run context finishes execution this causes the UI to render the ctx.run() as a zero (or microseconds) width span. Same for tracing.
While this not a blocker it would be nice to fix this to be aligned with the remaining SDKS and to give proper representation on both UI and tracing