`tab_spanner_delim` with `gather = TRUE` not working

[pdeffebach]

Here is an MWE

r$> df = tibble(A_X = c(1), B_X = c(2), A_Y = c(3), B_Y = c(4))                                          

r$> gt(df) %>% tab_spanner_delim(delim = "_", gather = TRUE) 

Gives me this:

From the docstring, we gather = TRUE should re-arrange the columns.

On version 0.2.1

[rich-iannone]

Thank you for reporting this bug (which is pretty serious) and providing the MWE. This is highly prioritized so it'll be handled soon.