Why can't I get a short message by Fetion sometimes or the other party can't get it?

This kind of problem is really common. My girlfriend and I had a few quarrels about this, and the root cause was the internet. This situation generally does not appear when the network is good, such as late at night. And when you use Fetion, sometimes you get disconnected without knowing yourself. I also found a strange phenomenon of using Fetion. I have been chatting with a person for a long time, and I can hardly receive his short message with Fetion client. It would be much better to delete him and add it. You can also solve this problem in this way. Why don't you delete it and add it? This mobile phone network is very unstable, and there is nothing you can do! @