NDVI uploaded to cloud looks very different


I am using Pix4Dmapper for processing Micasense Rededge MX. In Pix4dMapper the NDVI index looks very good. Also when added as raster layer to QGIS it looks good (i.e. identical as it should). When I upload the NDVI tiff to Pix4dCloud, however, the map looks very different, and the scale has changed from 0-256 rather than -1 to +1. When I dowload the file again from the cloud and open it in an imageviewer, it looks fully ok. So the file is correct, but visalisation on pix4dcloud is messed up. Any ideas why this could be?

Best regards

Gilbert, Finland