hikvision nvr streaming

I am seeking help with an issues on multiple NVRs. Model: DS-7604NI-E1 4P/A Firmware: v3.4.96 The issues described below are also on a second NVR (same model but earlier firmware). Cameras: HikVision UK originals. All cameras have the latest 5.4.5 or 5.5 firmware applied based on what is...