Fixed in 15.4.1: https://discussions.apple.com/thread/256028948?answerId=261329643022&sortBy=rank#261329643022 https://discussions.apple.com/thread/256028948?a

Fixed in 15.4.1: https://discussions.apple.com/thread/256028948?answerId=261329643022&sortBy=rank#261329643022 https://discussions.apple.com/thread/256028948?answerId=2613... I also ran into it with 15.4.0 and worked around it by creating an image that's the solid color I like to use. It turns out that the system-supplied solid color options are themselves just 128x128 pixel PNG images too: https://discussions.apple.com/thread/256028948?answerId=261331281022#261331281022 https://discussions.apple.com/thread/256028948?answerId=2613...