Incorrect calculation for total winnings stats

i have played H2 and H3 previously, recently started H5.
My flatmate noticed a large discrepancy for total winnings stat , i had over 450 million compared to his 120 million. then it jumped by +100 million in a few days. i have not earnt anywhere near that much from racing and wheel spins , nor do i have this much cash (about 10 mill currently)

where is the extra money coming from or going to? as i dont see any of it.

the only thing i have done differently is bid more on the auction house, so i am making a guess that the refunded bid money is somehow being counted as winnings and altering the stats.

Platform: ( Series X, )
Edition: ( Standard, no Add-Ons, no game pass, no dlc’s)
Account: (solo account, flatmate uses my console to play but has separate account)
Xbox Settings: (default, we take turns to log in - play - logout, swap login - play - logout)
Attempted fixes: (nothing to fix, it is not broken, just an observational anomaly )

This is expected behavior.

Somebody reported that long ago (soon after game release) and after a while it was moved to will-not-fix.