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Haven converts some labelled Stata variable into numeric rather than haven_labelled

library(haven)
anes2016 <- read_dta("anes2016subset.dta")

In the provided dataset, the variables Sex, RaceEthnic, EducLevel, HSgrad, and BAplus should all become haven_labelled upon import into R. As far as I know, they are no different in Stata than many other variables in the dataset that do become haven_labelled upon import: each variable has value labels in Stata. In previous versions of the same dataset, prior to adding the Sex variable, Haven converted all the above-listed variables into haven_labelled.
anes2016subset.dta.zip