Picker: Upload error for new version 4.0.3

[Orlandster]

I recently upgraded filestack-js from 3.40.5 to 4.0.3 and noticed some weird error in the picker. Direct uploads to fielstack without the picker seem to work as before.

When using the picker the file properly uploads, I can also confirm that in the request, I see a proper response for the upload, there's also a green checkmark next to the file. But in the top left corner there's an icon indicating there was an error.

If then try to click "Done", it simply clears the list of uploaded files.

The response of the upload looks fine tho:

// I removed the actual values in some cases
{
    "handle": "...",
    "url": "...",
    "filename": "okb.png",
    "size": 879305,
    "mimetype": "image/png",
    "key": "...",
    "container": "...",
    "status": "Stored"
}

The picker options look as following:

        const options: filestack.PickerOptions = {
              maxFiles: 10,
              maxSize: ...,
              viewType: 'list',
              disableTransformer: true,
              cleanupImageExif: {
                  keepOrientation: true,
                  keepICCandAPP: true,
              },
              onFileSelected(file: Filestack.FileMetadata) {
                  ...
              },
            container: 'droppane',
            displayMode: 'dropPane' as filestack.PickerDisplayMode, // cast need due to filestack bug
            dropPane: {
                overlay: false,
                onDragLeave: () => this.showDroppane(false),
            },
            storeTo: {
                location: 's3',
                container: filestackConf.uploadBucket,
                region: filestackConf.uploadRegion,
                path: filestackConf.uploadPath + '/',
            },
            customText: {
              ...
            },
            acceptFn: (file: any) => {
                ....
            },
            onFileSelected: (file: Filestack.FileMetadata) => {
                ...
            },
            onUploadDone: (files: {filesUploaded: Filestack.FileMetadata[]; filesFailed: Filestack.FileMetadata[]}) => {
              ...
            },
            onFileUploadFailed: (file: Filestack.FileMetadata, error: any) => {
               ..
            },
        };

Let me know if you need additional info, thanks!