I have been looking online to see whether anyone else is having this problem. I have installed IOS 18 beta on all three of my iOS devices (iPhone and 2 iPads). ONLY ON MY PHONE the calendar is showing duplicate copies of a reminder (randomly with no apparent pattern) . When I select the option to go to the reminder in the reminders app, it goes to the reminders app and shows me only the single reminder. Here's where it gets weird. I delete the reminder from the reminders app and it still shows multiple copies of that reminder which should no longer exist. Any insight is appreciated.
BTW. I downgraded my iPhone back to IOS 17. I submitted this on the feedback app already.