Inconsistent Notification Stacking with stacked and newestOnTop

[in0vik]

When using React-Toastify with both stacked and newestOnTop options enabled, the notification stack behaves inconsistently, with notifications appearing to jump or reorder unpredictably.

[aminBenSlimen]

It shouldn't act this way but i think you don't need newestOnTop since there will be only one visible with stacked set to true unless you're dynamically changing stacked, in that case that's your situation a simple workaround for this bug is to make sure when an option is true the other is not.
<ToastContainer stacked={useStacked} newestOnTop={!useStacked} />