Can I suggest to anyone experiencing this issue that if despite your best efforts to always select gears in a controlled manner should you continue to find the transmission unexpectedly ending up in neutral that you try this test as per my video here.
This problem always seems to be blaming either a poor selector design with the shift by wire system or operator error. However I can confirm that in some instances it is simply down to a faulty selector which this test can verify as it dispels the common suggestions that the gears are either being selected too quickly / the lever is being allowed to quickly "snap" or flick back into position or the vehicle is not stationary when shifting between drive and reverse.
So starting with the car in park and keeping your foot on the brake at all times to ensure the vehicle always remains completely stationary
repeatedly select drive. Although this may seem nonsensical at first as there would never be a need to do this under normal driving conditions it will verify that some selectors are faulty and that sometimes when you select drive in a controlled manner and with the vehicle completely stationary that the transmission moves to neutral which you will see with the behaviour of my faulty selector in the video. Immediately after this test in my car we repeated the same test in the dealers vehicle and no matter how many times we selected drive this time the transmission always remained in drive.
Based on this comparison test with the dealers car they agreed that I have a legitimate fault and contacted Kia corporate who have asked them to replace certain parts in the selector. I am waiting on the parts to be received and can advise forum members of the outcome in due course.
My vehicle is an early production MY18 build and it has been suggested elsewhere on this forum that the problem is isolated to this model year so I would be interested to hear of any MY19 owners who can verify the same fault using my test method here: