Momo is black. Why did the other party send a message showing that it had been read?

Momo blacked out the other party and sent a message showing that it had been read for the following reasons:

1. Automatic reading: In some messaging applications, even if you blacked out the other party, you can still automatically read the messages sent by the other party. This is to ensure that you don't miss any important information or notice.

2. Read receipt: Momo may send a read receipt to the sender to inform the other party that they have read their message. This may cause other people's messages to appear as read, even if they have been blocked by you.