FYI -- Installing iOS 14.2 can cause instant crashes on loading IT (the app won't load). Rebooting the phone didn't seem to fix it; however, deleting and reinstalling the app appears to fix the issue.
iPad Pro - may require reinstall
iPad (5th gen) - no issue
iPhone 11 Pro - no issue
iPhone XS Max - may require reinstall
iPhone XS - may require reinstall
iPhone XR - required reinstall
iPhone X - no issue
iPhone SE 2020 - no issue
iPhone SE (1st gen) - no issue
updated to include latest reports and soften the original report.