any update on this ? did anyone test if this will work on production

i have same issue

when user downgrade subscription does the new plan start immediately ? in documentations : The subscription continues until the next renewal date, then is renewed at the lower level and price. so if this is downgrade or for a cross-grade between subscriptions the user the plan should not begin now correct ?  but the popup i am getting its saying your subscription plan will begin and you will be charged when your current subscription expires what i understand from the popup the user will get the downgrade plan immediately and pay the new price after expires that correct ?

Forgot to mention that I'm on the sandbox environment at the moment. Any help is highly appreciated.