When uploading a large amount of images simultaneously (around 50)  the upload often gets stuck and only a few of them actually get uploaded. The screen shows almost all of them as partially uploaded but then all progress stops.

Is there a way to limit concurrent uploads apart from selecting fewer pictures for one upload and uploading it in more batches manually?

Could this issue be caused by the settings of the hosting provider?

A possible solution for us would also be to upload the images in a .zip file, but there is no option to unzip. Could this be added to JCE?