hikvision ip cam

I can't find any info on this problem so here goes. I have my two hikvision cameras connected to my hikvision 7608-ni-i2 NVR via Poe . When I've set the substream from its default bitrate of 128kbps to 1024kbps it resets back to the lower bitrate when I view the feed on my galaxy note 9 via hik...