Some text messages disappearing in a group chat on iPhone 17 Pro Max

Messages disappearing — why do some of my text messages just disappear? I have one group with two friends and all of a sudden it only goes back so far.… We’ve had the group going since the summer of 2024 but my text messages are only going back as far as November 21, 2025. Thank you. I’m on iOS 26.2 I have a 17 Pro Max. Rachelle

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Original Title: Messages disappearing