堆叠的条形图，显示R中的反向标签

我正在尝试创建一个堆积的条形图，在条形图的中间有标签。由于某些原因，标签在第二列（eIC）的位置放置错误。

这是代码：

Role.Type=c("Other", "eIC", "eIC", "Manager", "eIC", "eIC", "Design", "eIC", "eIC", "Other", "Product", "Other", "Manager", "eIC", "eIC")
Role=c('Agile Coach', 'Android', 'Backend', 'Eng Manager', 'Data', 'Data Scientist', 'Design', 'iOS', 'ML', 'Operations', 'Product', 'Quality', 'Director', 'User Research', 'Web')
People=c(3, 3, 20, 11, 10, 7, 2, 2, 21, 1, 11, 3, 2, 2, 5)
df <- data.frame(Role.Type, Role, People)

g <- ggplot(df, aes(Role.Type, People)) +
       geom_col(aes(fill=Role), position='stack') +
       geom_text(aes(label=Role), size=3, position=position_stack(vjust=.5)) +
       scale_y_continuous(breaks=seq(0, 100, by=10)) +
       labs(title="Team Role Breakdown", y="People", x="Role Type")
g

结果