2.0.12 has fixed this problem for formulae evaluating to negative values. But setting a parameter to a negative value directly still fails in the same way (wrapping to INT_MAX). (Should I make a new thread for this?)

For me, this seems to occur on blueprints with non-empty descriptions. I can reproduce this precise behaviour:


opening a blueprint with a non-empty description then immediately attempting to close it will prompt (incorrect)
opening a blueprint with a non-empty description, emptying the ...