TikTok keeps suggesting the same account when I search — how do I remove it

TikTok keeps showing the same account as a suggested result when I search. It’s the person’s exact username that appears under the search bar (not a previous search with the clock icon).
This has been happening for months. I have already tried:
● Blocking the account
● Removing the suggestion when it appears
● Clearing my search history
● Clearing cache
● Turning off contact syncing (I don’t have this person’s contact saved)
● Turning off “Customized updates and more” under People You May Know
● Logging out
● Removing saved login info
● Deleting and reinstalling TikTok
Nothing has worked. The account still appears as a suggested search result whenever I search.
Does anyone know what controls these suggestions or how to make TikTok completely forget a specific account? Is there any setting I’m missing?