If a stock has undergone a split, the historical quotes seems to be wrong for all quotes leading up to the day of the split.
E.g.: Amazon split 20:1 on June 6 2022. The historical quotes before this date are a fraction of the actual price. This happens for any stock where a split event is registered. I don’t know if this has any practical implications.
I noticed when I made a “Transfer between accounts…” transaction for SONY, where the quote on the transfer date seems to picked up from the historical quotes. The transfer took place on Feb 26th 2024 and the stock split 5:1 on Oct 9th 2024.