Dropzone not uploading all files

Hi everyone,

For our project we are using the dropzone widget for uploading and downloading files. However we are getting reports that sometimes not all files are uploaded into our application. For example when we want to upload 4 files, only 3 files are uploaded. Even though dropzone indicates that all files are uploaded. Unfortunately this problem is not consistent so we cannot reproduce this issue or pin point its origin. Does anyone else experience these problems with this Widget? We are using Mendix version 6.2

Thanks in advance!