Three updates have been pushed to the Verizon Messages app the past few days and there are numerous issues being reported. You can review them here if you're interested:
You may want to disable the app and use the stock text app until things are straightened out.
The stock app I have on my Note 4, defaults to my gallery when I try to choose an image to attach to my messages. Maybe there's another app I can use in the meantime.
The Bitmoji app can get messages across that standard text just can do at times. I can relate to why it’s important to you. There has been another update since last week. Have you updated the to the latest version?
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