If you want to spare yourself some trouble, open the Creative Cloud app and install the previous version of Illustrator. You can install that in addition to the current version. Use that version whenever you need to trace something. Make sure CC app doesn't delete old versions when updating.
Sorry for the delayed response. We understand that this might not be the experience you were expecting with Image Trace on Illustrator. To help get feedback for our product team, would you mind sharing more details, like the screenshots of the original file and the one after using Image Trace and details about the expected result, so that we can share this info with the team?