Lol ^ . He entered the equation!
Anyway, I have the fix. Solved it after days and days of fiddling and around 100 exports:
(along with solving the Upload Failed on Google Play Books problem. So proud.)
So, in Pages when you set an image to "Move with Text" (as you should) it adds that OBJ tag. It's a unicode anchor for the image also known as an Object Replacement Character. You can see it by turning on Invisibles (command-shift-i).
You'll notice that the placement of that symbol in Pages is the exact spot that the OBJ tag shows up in your non-Apple ebook reader.
SO, you need to open up your epub in Calibre Editor and do a Find/Replace for that obj tag.
"But I don't see the OBJ tags in Calibre!" You can't see them in Calibre. But trust me, they're there.
OH, THEY'RE THERE, ALL RIGHT.
Solution?
Copy the OBJ tag from here: https://www.compart.com/en/unicode/U+FFFC The red one or the black one. Doesn't matter.
Now in Calibre, open any page of your ebook. Hit command-F and paste that invisible symbol. Leave the Replace field empty. Before you hit Find, be sure to select "All text files" at the bottom.
You can do Replace and Find to see them one by one but Replace all is faster.
And looky here:
Now Save a copy of the sucker and test it! That's the safe way. I also change the Title of the ebook in the epb.opf file for easy identification in the Google book store.
Voila! No pesky OBJ tags!
PEACE!
may you live long and prosper