Layer effects are slightly broken in Photoshop CC 2019. The image doesn't depict exactly how an effect looks. So f.example if you have a layer of small dots in a high resolution image and add glow, the glow will look different depending on how much you zoom out the image. Also some times the effects are cut of in certain areas of the image and some times doesn't update when you make a change on some of the effects. This was not an issue before CC 2019. I have experienced this on two machines now and also completely re-installed one machine and the problem still exists, so it's most likely a bug in the software.