I don't know about others but this particular release seems to be riddled with various bugs that are not there in either 2019.1.1 or 2018.3. I have opened 2 tickets and 1 forum post so far and have run into various other issues that I can't be bothered with making more tickets without wasting a ton of time trying to pinpoint them instead of actually getting work done. The same exact flows seem to work totally fine in 2018.3.
Sorry to hear you are having issues with the latest release. I'd love to learn more about the various issues you've encountered. Let me know if you are available to jump on a call next week.
Product Manager, Prep Builder