Text messages disappeared after iOS 18.1

I just updated mine earlier. And I am ****** because it seems like I’m only missing them from one person. And it’s an important person too. When I look through the links and pictures, it says it’s all there but when I scroll through the messages or click on it nothing comes up. It’s all missing and messed up. It’ll have messages from recently missing then jump back to 2023, then forward to now etc. it doesn’t make any sense because I don’t use messages in iCloud, I don’t have an Apple Watch so am not encountering that glitch, I have my settings on keep forever so this literally makes no sense. I just want them back.

I contacted apple support about it and basically they said sometimes it takes 24 hours for the phone to finish indexing after a new update but if it’s not back within 24 hours of your update then you are out of luck and nothing they can do other than basically reset your phone and make you lose everything anyway. It really sucks. Like I wish I never updated it. Or they really should have a way to reverse the update as well. Because clearly it’s a fault on their end when other messages from others are there around the same time yet the ones from someone you speak with most are all gone.

This has been happening to me too, I just updated the phone to see if it's software issue but nothing. Only "old" texts I can see after scrolling back up is texts from a month ago that were received as SMS and Satellite. It's only happening to the person I text the most. Tried deleting the text thread and recovering it from the Recently Deleted and nothing, still having the same issue.