Unwanted white background when export book as a PDF

[AhmetSamsa]

When I make a PDF using the book feature, the background of an image is white in all documents except the first document in the book.

If I change the order of the documents, all but the first document have the same problem.

What I tried for the solution;
Save all documents as idml, convert back to indd.
Create new book document.
Give the frame with the problem image an object style. 

[Derek Cross]

Are the images JPGs?

[AhmetSamsa]

Hi. Image is  vector file. (filetype:ai.)
If I export each PDF separately there is no problem but when I use export book as pdf option there is problem.

[Jumpenjax]

Make sure you do not have a white background on your illustrator file. If so, turn it off. Maybe copy and paste in photoshop and save as a .psd file. Might solve the problem.

[BobLevine]

When you place the file, choose show options and make sure to select transparent background. This option is sticky.

[AhmetSamsa]

Thank you I will try that but if that was the case it should give error on all document. The vector file that give error is on master page. Master pages are identical on all documents inside the book. 

[Creamer Training]

It almost sounds like the computer can't process all the data properly. What are the specs of the system?

[AhmetSamsa]

• Windows 10 64bit
• 16 GB RAM
• I7-10700K
• GTX1070
• 500 GB SSD

I think computer is powerfull enough, it still freeze when preparing book file for export and during export. (Only when using book feature.)

Master pages are identical on all document and the image give error is on master page.  I even copied vector files directly into InDesign to ged rid of this problem but it still exist.