Instagram UI is broken and glitchy only when using my account on iPhon

Instagram has been unusable on multiple iPhones I’ve owned (past and present). When I log into my account on any iPhone, the UI is glitched — buttons are unresponsive, the search bar doesn’t work, I can’t upload stories, and even the sign-out button often freezes or won’t appear.

However:

• Instagram works perfectly on other people’s iPhones (when they’re logged into their own accounts)
• My Instagram account works fine on Safari, PC, and Android
• I’ve tried logging into a different Apple ID, fully resetting my phone, and reinstalling Instagram multiple times
• I’ve also tried resetting network settings and factory resetting my iPhone
• The issue has followed me across more than one iPhone, so it’s not device-specific

Example errors pulled from Console logs:*** NSKeyedArchiver warning: replacing existing value for key 'iab_post_click_data';

nw_resolver_start_query_timer_block_invoke: did not receive all answers in time

System Policy: duetexpertd deny(1) file-read-metadata

SpringBoard: Acquiring focus timer elapsed, clearing acquiring focus state

broken or outdated UI variant or is flagged incorrectly on my account. It doesn’t seem like a hardware issue, but something server-side or deep in iOS.

I’ve contacted Meta support repeatedly with no fix. At this point I’m wondering if it’s a corrupted container, cached account flag, or some persistent data corruption linked to my user ID.

Question:

Has anyone ever dealt with something like this?

Could this be a hidden iOS-level cache or bad account flag stored somewhere locally or server-side?

Is there a repair step beyond full resets I’m missing?

Thanks in advance — I’ve been dealing with this for months.