If you received an NSF fee from your bank, it means there were insufficient funds in your bank account to cover a transfer to your investment account.
Good news: you can set the exact day of the week or month on which you'd like your recurring investment to occur. Just make sure you have the latest version of the Acorns app to take advantage of this feature. Then visit Invest on the main menu and tap on Recurring Investment to set your preferences.
You can also manually invest Round-Ups until you're ready to reinstate automatic Round-Ups. Visit the Round-Ups screen in your app to make this change.