Yes @Karthikk, maybe I’m the unlucky guy, and something went wrong in my DB, something that does not happen to others. It would be much better if this is the case. But we should consider also that probably few users use the advanced Anki SM-2 scheduler instead of the default, and many of them, as I did in the past, as soon as they find the inconsistencies, changed back to the default, that looks much more stable.
Anyway, I think that is not difficult to track the issue; the only factors that should affect the interval of a card when reviewing are those mentioned in the documentation: last interval, overdueness, ease, interval modifier, maximum interval (if it is the case), and button pressed. Nothing else. If the team could look at my database, as in my case the errors are absolutely consistent and recurrent, maybe they would more easily discover what caused the strange behavior. I promise you they will not have to try more than 20 card reviews in this scheduler before they find some big issues.
For now, I gave up of Anki SM-2 scheduler, as I was at risk of messing up my knowledge base. I started using Anki SM-2 because I wanted some few customizations; e.g. it looks meaningless to me that during learning pressing Solid or Easy have the same effect (24h interval); it would sound much more logical that Easy would space it out a little more (4 days, for example); and I was also trying an initial higher jump after the second successful review (to 6 days, instead of 3). Nothing that big. It takes a lot of time and stress to identify these inconsistencies, report them, and so on. It is much cheaper to change back to the default and forget once and for all this so called Anki SM-2 scheduler, that stressed me a lot the two times I tried it (2 months ago, and again a few days ago).
Even it happens to only one person, it shouldn’t happen. And few things are so important in RemNote as the queue and the scheduler. I do still think a full review of Anki SM-2 scheduler would be a good idea. It’s true that few people reported problems; but it is also true that few people also said: “oh, I’ve been using Anki SM-2 scheduler for a while and it is working perfectly”, or something like that.
Thanks once more!