I have been noticing this trend and I believe that medical extension these days is a sign of approval. Most folks are now getting it within 1-2 days after extension.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/march-2020-aor.680165/post-9443614
https://www.canadavisa.com/canada-immigration-discussion-board/threads/march-2020-aor.680165/post-9443614