Preview bug, always scrambled
Preview is always messed up. Images attached, text is often spliced like this until I zoom in and out. Sometimes overprint preview helps but it's happening frequently and I can't see what my work looks like...
Indesign CC 2017
I have the same issue.
with Separations Preview palette, View turned on.
While zoomed in fairly close, toggle a color separation off and the page often displays as spliced and incomplete. Zoom in or out (redraw) usually fixes.