Uppercase labels with render_field macro

[msitte]

I'm trying to use the render_field with manually capitalized labels:

{% render_field form.soa_mname label="SOA MNAME" %}
{% render_field form.soa_rname label="SOA RNAME" %}

However, in the rendered HTML form the labels are "Soa mname" and "SOA RNAME".

The difference between the two is that the field soa_mname is a ForeignKey on a separate model class while soa_rname is a CharField:

soa_mname = models.ForeignKey(
  to='my_plugin.Nameserver',
  on_delete=models.PROTECT,
  related_name='zones_soa',
  verbose_name='SOA MNAME'
)
soa_rname = models.CharField(
  max_length=255,
  verbose_name='SOA RNAME'
)

It seems to me that the label is completely ignored, but on the other hand the bulk_nullable keyword argument for render_field works just fine. Any idea why this isn't working as expected?

Best, Matthias