An empty toast is rendered
An error occurs spontaneously during a toast call. The toast is rendered in the DOM tree but does not appear on the screen. The toast has content.
The <Toaster/> component is present in the App.tsx file. The call is felt through toast.success(). Below is a screenshot of what is happening:

Here is the app.tsx itself:

Running into this issue as well. For me, it only occurs when a user spams the action that summons the toast. (say 3-5+ summon actions).
Also if you're using a react server component adding a check to see if the component is mounted seems to solve it.
'use client'
// imports here
export function Toaster(props: ToasterProps) {
const mounted = useMounted()
if (!mounted) return null
return <HotToaster {...props} />
}
import * as React from 'react'
export function useMounted() {
const [mounted, setMounted] = React.useState(false)
React.useEffect(() => {
setMounted(true)
}, [])
return mounted
}
Also having this issue, I am using a custom toast and using the Headless UI <Transition/> component.
const showSuccessToast = () =>
toast.custom(
(t) => (
<Transition
appear={true}
as={Fragment}
show={t.visible}
enter="transform ease-out duration-300 transition"
enterFrom="translate-y-2 opacity-0 sm:translate-y-0 sm:translate-x-2"
enterTo="translate-y-0 opacity-100 sm:translate-x-0"
leave="transition ease-in duration-100"
leaveFrom="opacity-100"
leaveTo="opacity-0"
>
<div className="pointer-events-auto w-full max-w-sm overflow-hidden rounded-lg bg-white shadow-lg ring-1 ring-black/5">
<div className="p-4">
<div className="flex items-center">
<div className="shrink-0">
<CheckCircleIcon
className="h-8 w-8 text-indigo-600"
aria-hidden="true"
/>
</div>
<div className="ml-3 w-0 flex-1 pt-0.5">
<p className="text-sm font-medium text-gray-900">
Successfully updated role
</p>
</div>
</div>
</div>
</div>
</Transition>
),
{ position: "bottom-right", duration: 2500 }
);
