Toast hidden behind modal

[EDIT]
Found the problem. It plays the sound but when looking at the DOM through the Chrome DevTools I see no changes, when I close the modal however I do see the toast.... Except when I add another toast when the first one should still be there, then the DOM changes and I see a toast.

---

Somehow my Toasts suddenly started popping up behind the translucent modal backdrop. You cannot see them unless you close the modal.

I've tried adding this to CSS but that doesn't work either. Any idea?

toasty {
z-index: 1000000;
}

#toasty {
z-index: 1000000;
}