After the new update, and even though I have selected the option “Use an always increasing next review interval with Hard/Normal/Easy buttons after answering to modify the rate of increase,” a case like the following often appears, where the next (Normal) review time is shorter than the Hard option.
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I see this as well, and it doesn’t make any sense. But I frankly don’t understand this algorithm; is it supposed to lengthen the interval the next time the sentence comes up for 100%-review, based on what? Has anyone had the patience to verify what it does in the long run?
I have a big enough set of 100% mastered sentences that I do in fact see significant variation, and right now regularly get sentences that get scheduled two years out! Here’s a screenshot that shows the maximum I’m seeing after 863 days with 1/5/25/150 review settings: 789 for hard, 504 for easy. I have review fuzz on but do answer all the 100% sentences every day so 411 is a reasonable estimate for the last interval. Hard interval is around 1.23, easy interval is around 1.92.
For comparison, the first time I see (and correctly answer) a sentence after I’ve gotten it up to 100%, the previous interval is 150 , the hard interval is 180, and the easy interval is 252. This gives increase rates of 1.2 for hard and 1.68 for easy.
I did manually look up this sentence after answering but before selecting difficulty and got a review date of 2027-05-08, 404 days out. After selecting easy difficulty it does in fact move out to 2028-05-19, 781 days out (just over 1% off due to having review fuzz on). As a test, I did not select hard on the next sentence I answered (just clicked next) and it did not increase the interval, which I suspect is a bug related to the incorrect “normal” review button.
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