A reproducible example would be useful here:
FAQ: What's a reproducible example (reprex) and how do I create one?
Without having access to the columns you're using, I can only say that one uses dplyr::filter() with unquoted columns. So your script may look something like:
cwm %>%
group_by(ordernumber, description, customer) %>%
filter(description != "Local Delivery")
Is it possible you aren't using dplyr's filter somehow? stats::filter() returns something similar to your data frame of V1, V2, etc.
If you explicity call dplyr::filter() do you get the same issue?