notistack should not override the web fonts
It overrides the font whenever it appears on the screen
Just use material-ui with the custom font, unlike default Roboto

I use CRA
| Tech | Version |
|--------------|---------|
| Notistack | v0.8.6 |
| React | v16.8.6 |
| Browser | Chrome |
|@material-ui/core |v4.1.1 |
|@material-ui/icons |v4.2.0 |
|@material-ui/pickers |v3.1.1 |
|@material-ui/styles |v4.1.1 |
I think I had that problem recently: Make sure to have the SnackbarProvider inside the MutiThemeProvider.
Thanks @DASPRiD
Please confirm if the solution above solves your issue, otherwise please provide a sandbox reproduction.
Thanks.
Hello,
I have the same issue. It is reproducible using Mui 4.1.3 using a custom font for typography and notistack 0.8.8.
Moving SnackbarProvider inside the MutiThemeProvider didn't solve the issue for me.
Most helpful comment
I think I had that problem recently: Make sure to have the SnackbarProvider inside the MutiThemeProvider.