We have a NDI-PTZ1, a Spark HDMI and a Spark SDI. If we switch from a non-NDI-source (DDR, GFX, SDI) to this NDI-sources we have a delay (~12frames). If we switch in the inputsettings of this NDI-sources to "Low Bandwith" then no delay but the quality is worse. If we use the NDI TestPatterns from a Windows-computer as a source on the TC and switch to this, there is no delay. All sources are on the same switch in the same networksegment. If the NDI-source ist running there is no problem.

Any idea?