Roku isn't doing it. Note that any apps removed from one Roku device are removed from all Roku devices linked to the same Roku account. If you have multiple Roku devices linked to your Roku account and someone else removes Fubo from their device it will get removed from your device. Check the email address that's displayed under Settings->System->About and use that email address to log in at https://my.roku.com. There you can see all the Roku devices that are linked to that account. There may be one you didn't know about or forgot about or possibly your Roku device isn't linked to the account you thought it was.
Roku isn't doing it. Note that any apps removed from one Roku device are removed from all Roku devices linked to the same Roku account. If you have multiple Roku devices linked to your Roku account and someone else removes Fubo from their device it will get removed from your device. Check the email address that's displayed under Settings->System->About and use that email address to log in at https://my.roku.com. There you can see all the Roku devices that are linked to that account. There may be one you didn't know about or forgot about or possibly your Roku device isn't linked to the account you thought it was.