Have you encountered anything like this? In a current project (a brew-pub with a lot of TV screens) that has cloud-rendered panoramas as the end product, decals appear as expected in the Realistic and desktop-rendered views, but incorrectly in cloud-rendered views:
Not knowing where the problem lay, I started a new clean R2019 file with the architectural template, placed the desk and computers, and created four decals in the order they are shown. I then placed them in the same order, left to right. What you see is pretty typical of what I've been getting: the first decal image is ignored, the second one is correct, and all the rest are copies of the third image. The fourth image is ignored.

I've sent this in to Autodesk tech support, but thought I'd ask the REAL experts as well.