Cannot revert the traffic of the production environment with Traffic Splitting in Static Web Apps

Hi,

I'm currently evaluating the Traffic Splitting feature of Static Web Apps, and I've encountered the following issue:

Steps to Reproduce the Issue

1. Deploy two environments, Production, and Preview, to Static Web Apps.
2. In the Traffic Splitting settings window, set Production to 0% and Preview to 100%.
3. Attempt to revert Production back to 100% in the Traffic Splitting settings window, but find that Production is grayed out and cannot be selected.
5. When I delete the Preview environment, the traffic for Production returns to 100%.

Is this behavior expected? Once I set the traffic for the Production environment to 0% once, is there any way to revert it back to 100% without deleting the Preview environment?

Thank you.