What reason are you using Acrobat to edit then trying to go to Corel? Why not directing import the pdf to Corel?
As I am partially working from home office now, it is an easier approach for me to use Adope Pro at home, while CorelDraw on work PC. Challenged by Covid-19 - but trying to solve this puzzle.
might try choosing these settings when doing a save as from Acrobat
If you're using live transparency that could be an issue. You could always distill it creating a new formatted PDF.
Unfortunately, the miracle did not happen: