Solved.
With Danika’s input I went back to inspect the line above “ignore reviews before” (the search box, right?). Turns out I had very slightly changed the preset name in these months and anki didn’t update it…
Now that this is done, I’d like to add one little question: in the search box for one of the presets it says
preset:“my preset name” -is:suspended
and this line is not “text” like in the other cases, it’s greyed out and I can’t edit it but simply replace it with my input if I start typing. The optimization went smoothly with this one, so I guess this is more of a curiosity.