Suddenly send a message to a friend, and the other person's avatar becomes transparent.

Suddenly send a message to a friend, and the other person's avatar becomes transparent, which may be one of the following situations:

1. The other person's avatar may be a transparent picture, which is rare, but not impossible.

2. There is something wrong with your device or network, which leads to abnormal avatar display.

3. Your friend may be using some kind of chat software, which will specially process or encrypt the avatar.

In order to determine the specific reason, you can try other forms of contact with friends, such as telephone and video chat, to check whether the avatar is still transparent. If the problem persists, you can try to clear the cache or restart the device, or wait a while and check again. If the problem persists, you may need to contact your network or equipment vendor for further assistance.