Outlook desktop app and iPhone app shown on the same date. Outlook calendar is selected as viewable on the iPhone app. iPhone app is up to date.
I tried restarting my phone and the app, that didn't work. I deleted the calendar then added it back in. That worked for roughly 3 hours, then it stopped syncing properly. Using an iPhone 12 on iOS 17.6.1. This also had a problem with iOS 17.5.1. The problem started happening roughly 2 weeks ago.