This is a continuation of #CS0522713 that was initiated by our contract manufacturer but that thread has been locked by TI and our contract manufacturer has requested help in solving the problem from us (the designers/owners of the design).
At the end of #CS0522713, David Liu asked "is there a way you can change such that the HPD_SNK goes high after 3.3V is stabilized?" I would like to understand why this is necessary. I will modify our circuit to add this functionality as a test but expect this should not be a problem. Our device is a source and we expected we should be able to directly connect a powered video monitor to our unpowered device (the SN75DP130 output/sink signals), power our device on, and expect to get video. So we would like to understand if and why this is an expected operational failure of the SN75DP130 before modifying our product to avoid these failures.
As mentioned in the previous thread, hot plugging works reliably and we have no reason to suspect any problems with the cabling or connectors. This has been tracked down to failures of the SN75DP130 that are fixed by replacing the SN75DP130.