When I favorite a sentence after I answered it correctly (in multiple choice mode), the act of favoriting changes the review interval (seemingly arbitrarily).
How to reproduce the error:
I had a sentence with 75%. I answered it correctly and it changed to 100%, and with the default settings would be shown again in 180 days. Then I favorited the sentence. (I tried this with multiple sentences that were all at 75%.)
- For one sentence, the interval was changed from 180 days to 174 days.
- For a second sentence, it was changed from 180 days to 176 days.
- For a third sentence, it was changed from 180 days to 181 days.