Ever since updating to IOS 18, my messages are disappearing

I have been having the same issue. I text my husband daily and it's only his messages that are disappearing daily. I have him pinned at the top of my messages and I noticed that it is happening every 24 hours. but yet there are messages from last year on there but not the most recent ones. it's really annoying.

this update has been one of the worsts updates since I have done it my phone has been so glitchy! I wish I hasn't bothered with it tbh.

Hi, I had a problem with messages disappearing too, I’m not tech savvy so I called Apple support. It took 2 hours but we were able to retrieve them all (I think)!

I also see a glitch- when I’m in the phone mode and under recents- if I click on the ‘I’ to the right of a person, so I can pull up their info to text them instead of call, when I click messages, it brings me to all my messages and not immediately to that persons text. Weird, all these problems and glitches, why???

I have had the same exact problem since I updated Sept 28. I was on the phone texting and calling for two days when they continuously told me to restart my phone. Nothing worked. I went into an Apple Store the third day and one of the employees told me to wait for the update. I switched my 14 pro to the 16 pro and did the IOS 18.1 update and still, my conversations continue to disappear. It’s been over a month of dealing with this and what’s odd is that it’s only happening to one primary conversation I text often in as well.

I’ll throw another twist in this the message disappearing is also happening to be I also have large gaps of mission messages all with one contact. The new twist I could put to is the Apple Watch that is connected to that phone can see the full message history with that contact in the watch messenger app.