I have been having this issue for quite some time. I switched to Verizon in 2014 from Sprint but this is becoming very problematic. It seems to happen mostly with group messages but I've seen it also with one-on-one messages. Sometimes I have to totally reboot my phone for the messages to come through. This is EXTREMELY AGGRAVATING and would like some guidance on how to fix the problem.
We want to make sure that your messaging works properly, MrsBits. I would feel the same way if my texting was not working. Let's investigate what is happening. What texting application are you using? Is it the one that came installed on the device or a third party app? Are voice and data services working okay? Is this happening with only specific contacts, or everyone? I it mainly happening in group conversations? Please provide more details so that we can get to the bottom of this.