And today it started working. I did install a Floodlight cam this weekend. but didn’t change anything else in the app. But today at least, it is previewing correctly again!
Hey neighbors! If you’re still experiencing this concern, please give our support team a call at one of the numbers available here. They can take a closer look at this to help resolve it for you. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support. 
Deleting the app, turning phone off/on, reinstalling app seems to have solved my issue for now.