Expectation of factors in DMT01

Hi,
This issue covers beyond DMT01, but primarily impacts this extremely common table.
We can pass many variables into DMT01 to summarize (normally Demographic and Baseline Characteristics). If a category of a variable is present in one treatment group, but not another, then DMT01 fails and requires the variable to be passed as factor. This is a little erratic, especially as it will happen entirely dependent on data and its spread across treatment groups - and will eg. cause an error as data changes, or when applying filtering.
I understand this is not a `chevron` issue, but broader - but is there a better way we can process these types of templates so that the user is not forced to keep updating columns to factors just to display 0 under a treatment group?