BoundingRectWithSize returns the wrong height

Question

I wrote the following method to calculate the height of an NSAttributedString with a given width:

- (CGFloat)findHeightForText:(NSString *)text havingWidth:(CGFloat)widthValue {
    CGFloat height = 0.0;
    if (text) {
        CGRect frame = [text boundingRectWithSize:CGSizeMake(widthValue, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin| NSStringDrawingUsesFontLeading attributes:@{ NSFontAttributeName : [UIFont systemFontOfSize:14 weight:UIFontWeightRegular] } context:nil];
        height = ceil(frame.size.height);
    }
    return height;
}

In addition to color, the attribute label string only has a font attribute:

NSFontAttributeName : [UIFont systemFontOfSize:14 weight:UIFontWeightRegular]

The problem is that sometimes it returns an invalid value. For instance. I see that the text is laid out in three lines, however the height value that I get has two lines. In the same way, sometimes it returns a height value for two lines, while text can be laid out using one line.

I do not pass paragraph style because NSLineBreakByWordWrapping is the default.

I read similar topics, but none of them gave me a solution. What am I missing?