text messages fail in some threads if they are text. I can only send pictures
I have a Weird Thing happening. I am unable to send text messages that are either text or emoji in some of my text threads. I get a "couldn't send message" orange exclamation mark. It seems to only happen in group messages but not all of them (only two so far). However, I am able to attach pictures, video, gif, stickers, etc. This can make communication a little... challenging. I have to edit pictures or take pictures of post-it notes to include words in my messages.
This started in late March/early April 2019
I have Galaxy S7 and the software is up to date (I just checked).
Does anyone have thoughts about what's wrong and possible solutions?