Same issue here on an iPhone 17 Pro Max.
I’ve dealt with this on and off for years, and it’s frustrating that accessing photos and videos in iMessage is still so unreliable.
I lost all my messages in 2020, so I’m cautious about trying half the fixes suggested. It’s annoying when you just want to revisit a memory in a chat and can’t because of this problem.
Honestly, I wish focused more on core functionality instead of things like yearly Memoji updates. I’ve even had to reinstall WhatsApp — and as much as I don’t love it, it just works better for power-users.
Anyway, just adding my experience!
