I upgraded my Echo Show V1 this morning to firmware 628538020 which fixes the issue with playing certain types of streams. However, this new firmware introduces a new issue: the colors for background images are wrong. Some multicolor images are now rendered black and white. Others that have for example blue coloring, such as lettering in the attached pictures, now have the blue areas rendered in a dark red. The art image though is rendered properly so it is just the background image that has problems.
This is how the image renders on my Fire Stick and how it used to render on the Echo Show. This is how it should look:
This is how it looks now on the Echo Show V1 with the new firmware:
When the AudioPlayer is not running, the background wallpaper I have set as well as the various Amazon curated stories that are pushed out render fine. Only the AudioPlayer is having background image problems. Not a show stopper for me but will need to be fixed as I am sure other people will have issues with it. I will test on an Echo Show V2 Monday when I am back at my office.