We are extending mytravelandexpense Fiori application to make it able to upload multiple files using UploadCollection control.
The issue we have is that event method onBeforeUploadStarts is implemented, defined, but not called. As the result, header parameters are setup in the method OnChange that is called one time per upload, but not per file. So, we have files uploaded to SAP and properly attached to BUS2089 object, but all files have the same file name (files content is different and proper).
Could you please advise where can be the core of the issue?