An error occurred while saving the commentLuensa Lamoriti commented
I have a very similar issue with imported tables from Word. It slows down InDesign to a crawl and makes it essentially useless. I have no idea when or how the corruption happens (the slowdown happens pretty gradually in my case).
A workaround that I found is to cut and paste the tables from the problematic file into a new InDesign document making sure that the spaces where the tables were previously placed are deleted and the styles applied to that space are deleted as well (I used a paragraph style to span the tables over multiple columns). Then I cut all the remaining text and images and paste that into a different new InDesign document as well. Finally I cut and paste the tables back into the document that has the text and images. I also make sure not to copy any spaces around the tables before pasting it into the new document.
My guess is that it has something to do with the formatting between text and tables in Word. I think this because when I separate the tables from the text in Word, paste each into it's own separate Word document, then remove all formatting from the tables and the text documents, and then place them into the InDesign file one by one, I do not get the same issue with slow down. It's cumbersome but it worked for me. I hope this makes sense... my head is spinning just from typing that.