Huawei bracelet B3 sometimes has text messages or calls that don't vibrate to remind you?

New messages and incoming calls will not vibrate to remind you when:

1, without a bracelet;

2. Turn on the Do Not Disturb mode, during the Do Not Disturb period;

3. No new messages will be pushed to the bracelet when the mobile phone is in use;

4. When the bracelet is open, there is a message to remind you not to vibrate.

When the interval between receiving multiple messages in succession is too short to 12 seconds, the newly received message reminder will not vibrate.