I am using the nightly build for version 6.0.0-rc1.
This problem relates to the case in which you have placed a large bit-mapped image into eeschema, and have objects atop it ("in front" of it), such as library symbols, wires, text, etc. (Imagine the image being a background for the entire sheet, used as merely a temporary guide for placement of the true spreadsheet objects.)
Under these circumstances, "Grabbing" (G) an item sometimes grabs both the object and the image behind it. For example, Grabbing a symbol does *not* grab the background image (it grabs only the symbol), but Grabbing a wire or endpoint of a wire *does* grab both the wire/endpoint *and* the background image. The effect, of course, is that when you move the object you've grabbed, you inadvertently move the image as well. (But the background image doesn't visually move until after you drop the object you actually though you were moving, so you don't even know you're doing it.)
Unfortunately, you can't just easily work around this by moving the image afterward to where it was supposed to be, because of Bug #1787404.
Is this a duplicate of https:/