Attributes "variable.labels" are not shown under column names in the View() function

When I execute the code

df <- data.frame(x = c(1, 2, 3), y = c(4, 5, 6))
attr(df, "variable.labels") <-  c(x = "This is x", y = "This is y")

I see attributes of "variable.labels" under column names in the View() function on RStudio 2022.07.4+587 "Spotted Wakerobin", RStudio 2022.12.1+366 "Elsbeth Geranium" & RStudio 2023.03.3+547 "Cherry Blossom".


However, with version RStudio 2023.06.3+581 "Mountain Hydrangea" and later (include the last RStudio 2024.04.0-daily+426 "Chocolate Cosmos") there is no display attributes of "variable.labels".


There is a similar problem with displaying attributes of "variable.labels" with these versions for Server Solutions, for example, on

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