S3 Transferutility does not Upload and keeps waiting status

My team has an app running on both Android and iOS that needs to upload media files (video ad images) to an s3 bucket. The solution was implemented using S3 Transferutility and it was working fine, but we discovered this week that we are having some issues on Android.
Now, when we try to upload a media file on Android OS the transfers state keeps waiting indefinitely. iOS is working fine. AWS SDK Core: 2.18.0

Does any one of you have any suggestion on what could it be?