Could this be because of the way the price is determined?
I don't know, but I heard several reports from people who use big centralized exchanges like MEXC that some of them are unable to withdraw monero and they have some network error message,
probably because exchanges don't have it, so all this exchange rate is just imaginary rate and numbers on the screen.
More correct rates can also be found on bisq.markets, but I would like to see devs return to the forum and reply here.