Bubble uploader sucks, i highly recommend using Better Uploader [UPDATED 2024] ☁ to avoid junk and unecessary calls. Plus you can upload to your browser first, then send to your database (to avoid junk if your user upload twice or some)
also it gives you more control over things such as upload progress so you can add a loading icon or someting when loading progress is < 100 and loading progress > 1