Getting banned after sending five messages

[lorenzopic]

Hello there, I am using the library with multiple landline numbers on Whatsapp Business, sending and receiving work as they should until I try to send multiple messages. When I try to send a list of more than five messages the number gets banned after the fifth one and I see a message similar to this number is being used on another phone, afterwards it asks me to login again and shows me that I have breached the ToS. I have a delay of five seconds between each message sent and they are all different from each other, the only thing I modified is the name showed when the program connects to the Whatsapp (the default "Whatsmeow"). Any clues on what might be causing those bans? Thanks in advance

Edit: the numbers I am sending the messages to have never contacted me before and are not in my contacts.

[ahmedRSA]

no one is facing ban you must be doing something wrong

[lorenzopic]

I am just sending normal text messages with 5 seconds delay between each:

_, err = client.SendMessage(
        context.Background(),
        types.NewJID(sendMessageReqJson.Target, "s.whatsapp.net"),
        &waProto.Message{
            Conversation: proto.String(sendMessageReqJson.Content),
        },
    )