Keynote problem after the new update with Big Sur

Hi guys,

I am creating digital planners in Keynote and I have a problem with the files. When I convert it in PDF it's loading forever on the apps I'm using after that. I don't have problems with planners that I created from before or other PDF files I created in other apps.

Also when I want to convert from PDF file to JPG image on 300 dpi the quality it's not so good as before. This is from the new update.

Is someone has any problem with Keynote?