So we may need to be careful with WeeksToQ: WeeksToQ
But if the directions are not switched then I wonder why as an individual feature it is clearly monotonically increasing (as you have shown), but monotonically decreasing with other features as shown by AlgoMan’s SHAP curve.
As far as how to use this in LightGBM maybe turn off monotone constraints for this one (whether it it PIT or not). But I think there may be even more to this.