When or why did Yahoo Finance stop adjusting historical mutual fund prices for dividends and capital gains? For example, FBALX and FSUTX both declared dividends on 4/6/2018, and FSUTX declared a capital gain as well. However, Yahoo's historical prices show the adjusted prices to be the same as the closing prices for both funds for the trailing period. Going backwards in time, the adjusted price departed from the closing price only on and before 12/6/17 for FBALX, the time of the last previous distribution. Thus, the previously posted adjusted prices are still there, but they are not updated to reflect the new distribution.
Is this a new policy, an oversight, a bug, or what?