Sound goes off completely when trying to record

Hi there. I have been trying to record in music studio but my audio keeps going off. It works for a couple of seconds, then goes silent/no input. I have a ton of files stored on there, so I am not sure if this is the reason. I didn’t have a problem until after the latest iPad update. I have tried toggling Bluetooth and mono on and off and this works for a couple of seconds before going silent again. Would love to record again so any help you can give me would be greatly appreciated. Thank you!