Between 7 am and 9 am US Central Time, Twilio (Kickserv's text messaging service) reported connection issues. Kickserv's own application log showed some errors sending text messages. It's likely that some text messages sent by the Kickserv application encountered the Twilio error and were unable to be sent. By 9:55 US Central Time, the Twilio service was once again operating normally.
If you have reason to believe that any text messages (estimates, invoices, or notifications) did not make it to their destination, you can resend them now.
More information about the Twilio outage: https://status.twilio.com/incidents/zmz5c9prz8mm