Problem maintaining figures and images in the export file

We are having some issues where figures and images in the source Word file would disappear in the exported target Word file after translating with using Trados.

We are assuming that this problem is something to do with when Trados package/project is created by Trados 2015, then processed/translated by Trados 2017.
 
As you can see in the below images, there are some chemical formula in the source English Word file , however those are gone in the target Word file after translated with using Trados. (This project was created by project manager who uses Trados 2015, but translated with using Trados 2017.)

 

 

After the translation image below.

Please let us know if anyone knows how to fix this problem.

Thank you very much!