I do have a lot of equations in the study but they are all correct,
Well, there seem to be a couple of relevance equations that are slightly different to others (e.g. spaces, etc), when looking at them in the LSS file. For example this one:
There are some "((" and "))" missing compared to the others and there are also some spaces, that can't be found with the others. But I don't know what impact this would have, I would guess none. I doubt that this is the problem.
I was more looking for some real equations (not relevance equations), that might have somethink linke Qcode="A1" or something, where one "=" would be missing and thus redefine the answer instead of comparing it.
But I couldn't find any of those instances in the LSS and there also seem to be no equations referring to the question from the screenshot anyway.
So I guess we can rule this out as the source of the problem.