Hi Saravaj,
I have also faced the same issue for some document types. I tried the below steps and it works for me. You can also try the same but I didn't get the exact reason behind it.
1. Go to DC10
2. Delete the document type for which object links are not coming.
3. Configure it again, assign the object links.
4. Move the TR
5. Check in EasyDMS
Good Luck!!!
/TRB