Vector art and placed images randomly shift and resize themselves

Good afternoon,

Both myself and my fellow designer where I work have noticed an odd anomaly since upgrading to Illustrator 2017. When we place a raster image into an Illustrator document and resave the file,it will, on occasion, shift the placed image within the document or resize the image to a random percentage of its original size. This is EXTREMELY frustrating as we are building files for customer approval and once it is approved we are trusted to output the file as the customer wants and this issue causes us to have to redo our work and either require an additional customer approval before it goes to the printer, or if we are lucky enough that the PDF did not change, to simply open the PDF in Illustrator and save over the original .ai file.

In addition, some JPEG files come in as a much larger image than the original Photoshop document. Below is an example of both issues that happened on the same document. The first is the .ai file when I placed the four JPEG files into the layout. As you can see by the box signifying the outer dimensions of the art, there is a tremendous amount of blank space above the actual art in both pink files.

The second image is what i found after opening the file again after saving it in Illustrator for the first time. Both pink images had shrunk considerably from their placed sizes. The info palette showed them at 10.496% of original size.

Now, before someone says that the problem may just lie in the two pink files, let me assure you that it is NOT an isolated incident. This is only one example of multiple instances regarding these problems. This is the simplest example as yet. We are also experiencing vector art shifting from its originally saved position when exporting to a PDF from Illustrator. Again, this is a MAJOR issue in that our product requires very, very precise registration for output and we cannot output the files correctly unless they are EXACTLY as the customer approved.

We would REALLY appreciate any insight on these issues.