Always filter your images before processing. I know it is easy to get complacent and I have seen the effects of it myself a few times but any images that has a moderate amount of blur will harm the reconstruction. Basically you are introducing bad data instead of just letting the surrounding data stitch across. This one is new to me using an electronic shutter. I have never seen this before with other similar cameras. This one was easy to spot, lol. First one in 3500 photos so no consequence just an oddity for the day.