Guy's glad you chimed in on this, I ran out of steam....
Charlie_V, Tig , Think you guys hit it spot on as a problem with the image itself. That didn't dawn on me , 😲 ,I've gotten in the habit of pre checking images in Gimp early on due to weirdness like this. Didn't think to mention check the image ......
Pbacot, Yeah... thought I could help the O.P. by "reverse engineering" the problem also known as"shooting in the dark". Got a taste of what you SU guru's go through... 😕 not so easy.
Brings up a question for you guy's, hope you see this. I discovered early on mac + pdf image = weird behavior , so learned not to use them pesky .pdf's. What's up with that out of general curiosity ?