Why do you sometimes receive incomplete messages, sometimes not the middle part, sometimes not the back part, and all of them are replaced with (...), while the envelope style of the inbox is ...

Sometimes your signal is bad, or the other party's signal is bad, it will show that the text is lost.

Sometimes the whole message is lost, sometimes it is half a message, or it may be a damn mobile phone message failure.

Most of the lost messages will eventually be retransmitted.

Because the message was incomplete, the pattern was torn.