My audio messages are fluctuating in volume when I record it

While recording audio messages on iMessage the message comes out so low and Midway picks up. It only happens on iMessage I tested it out on Instagram Snapchat and WhatsApp send audio messages are perfect why is this happening on iMessage. I am using speech to text while typing this so it is not my microphone it is iMessage please do not give me articles on cleaning microphones because that is not the issue. Thank you and hope I can hear from somebody soon.