iOS Mail "follow up suggestions" continue even after disabling

The Apple native mail app still displays old sent messages in my Inbox even after disabling the "follow up suggestions" (Settings > Mail > turn off Follow-up suggestions). To rule out an issue with mail provider: if I go to my inbox via web browser I cannot reproduce the problem. Of course, I can swipe + dismiss the 'suggestion' for individual emails but would rather disable globally to prevent this in the first place. Have restarted, deleted email account + readded, disabled lockdown mode, etc. Open to any suggestions, thanks!

iOS 16.5 iPhone 14