Just to let know the update of my IPC-HDBW2431R-ZS/VFS 's from DH_IPC-HX2X3X-Rhea_MultiLang_PN_Stream2_V2.800.0000013.0.R.191202 to DH_IPC-HX2X3X-Rhea_MultiLang_PN_Stream2_V2.800.0000018.0.R.210707 went smoothly via the NVR. I had to reboot the NVR after updating its firmware. Looks stable after a few days.