This happened to me in Catalina as well. This summer I was preparing the paper proceedings for a conference, which were made with InDesign. I had to remove a co

This happened to me in Catalina as well. This summer I was preparing the paper proceedings for a conference, which were made with InDesign. I had to remove a couple of pages from the output, did so with Preview, and from then on, the text was garbled on copy-pasting. Had to switch to using Acrobat for that step.