Chat often will not accept my messages

Many times I will enter a message in chat, and my message will not appear in the chat room. The only way to recover is to restart the game. I’m thinking this may be related to leaving the game running but untouched for fairly long periods of time (over 15 minutes). Is there anything else I can do to recover from this?

I’m playing on mobile (a Samsung Galaxy S5 running Android, in case you care)

This is happening to a ton of people, please check some of the other chats (such as Enough is Enough 3.4) to get some ideas that may work for you.