Not receiving inbound text messages - random

I am not getting all of my inbound text messages. This has been going on for a few days. I sent myself separate text messages today in this order: "1, 2, 3, 4, 5, 6" ... I only got 1, 4, 6 (out of order) and 5 .. I have had clients commenting that I have not responded to their text messages. I have not received them, nor have I received the notification emails from RingCentral.