I’m hoping the community will have success recreating what I believe to be a bug in FSRS scheduling in Anki version 24.11
The steps to recreate this are as follows:
- Lapse on a card’s review with re-learning steps set to an interval of <1 day
- When the re-learning card is presented again, take note of the intervals (we will call this interval set A), but do not answer the card
- Review the lapsed card on the following day, such that the re-learning interval is now >=1 day
- See the new intervals for various answers (we will call this interval set B)
In every instance for my deck, interval set A is significantly longer than interval set B.
A similar phenomenon can also be observed when removing re-learning steps altogether and FSRS sets the re-learning interval to >1 day. Thus the issue could alternatively be framed as “intervals are far more aggressive when re-learning a lapsed card following a re-learning interval of <1 day”.
From a learning perspective, this seems to make little sense - If I have remembered the card after a day or more, presumably stability should be greater than the same outcome occurring within <1 day (i.e. interval set B would be expected to be the same or longer than interval set A).
Version 24.11 (87ccd24e)
Python 3.9.18 Qt 6.6.2 PyQt 6.6.1
0.1933, 1.1883, 4.9589, 25.8480, 6.8185, 0.8389, 2.2436, 0.0010, 1.6363, 0.3619, 1.1357, 1.8182, 0.2406, 0.2460, 2.4502, 0.0000, 2.3685, 0.8411, 1.6638