Habit Typo
When a typo becomes so habitual it’s like it’s a second language, and you don’t even notice you’re wrong anymore.
I say 'I’m gonna go to the store' but I write 'I’m goin to the store' and it’s perfect.
My text said 'I can’t wait for dinner' but I spelled 'dinner' as 'dinner' and it was fine.
I wrote 'I’m tired' as 'I’m tred' and nobody called me out.