Moto X Pure :: Texting App Starts Composing Nonsensical Strings Of Letters And Words

Every few days texting takes on a life of its own, starts randomly and rapidly composing nonsensical strings of letters and words which I cannot stop. The X/erase button does not work. Putting my finger within the text results in green trails. I must turn off or restart my phone to stop this behavior.

Have had the phone about 2 weeks; only added 2 apps - weather underground and pedometer which did not affect the phone at time of adding them.

I close my apps faithfully, having learned to do that when my phone started flashing webpages rapidly as well as the text feature going wonky.

Also, some text messages have to be downloaded to read them.