Messages show as sent but never delivered
Delivered status never appears (if your app shows delivery)
Calls go straight to voicemail or fail to connect consistently
You can’t see their latest seen status or it stops updating
You can’t see their online status
Their profile photo stops updating
Their profile name or bio stops changing (if you previously saw updates)
You can’t view their story/status updates
Their posts or profile appear missing or blank when you search for them
Your messages remain unread (if you can normally see read receipts)
Read receipts never appear even though they normally would
Your chat remains at the same “unread” state for a long time
You can’t access their profile details that were previously visible
You see an error when trying to open their profile or media
Search results no longer show their account (while other accounts do)
You can’t see mutual interactions that you previously could
Their account appears deactivated or removed
They may have changed privacy settings or blocked certain features (look for consistent loss of visibility across multiple areas)