I have 2 Matrix fields, both of which use Dropdown fields.

Matrix: urls
    address (block type)
        context (dropdown field values include 'own')
        address
        urn

Matrix: logos
   svg (block type)
        usage (dropdown field values include 'monoNeg')
        aspectRatio
        svg (source code)
   img (block type)
        usage (equivalent dropdown field)
        img

I'm pairing a urls value with a logos value in a loop to write linked logos.

I can get the relevant url easily enough with:

{%- for org in footer.footerAccreditations -%}
    {% set orgUrl = org.urls.context('own').one() %}
    {{ orgUrl.address }}
{%- endfor -%}

Which prints the address URL just fine.

But the same approach for the svg logo isn't working. Either one of the following returns 0, even when I know for sure that the org entry in question has a monoNeg SVG source.

{% set negLogoDirect = org.logos.usage('monoNeg').one() %}
{{ negLogoDirect|length }}

{% set negLogoTyped = org.logos.type('svg').usage('monoNeg').one() %}
{{ negLogoTyped|length }}

If I run through an all loop for the logos their usage reports exactly as I would expect:

{% set orgLogos = org.logos.all() %}

{% for logo in orgLogos %}
    {{ logo.usage }}
{% endfor %}

I assume I can make my template more verbose and get what I need, but I don't see why the same approach should work for one Matrix dropdown field and not for another.

Where am I going wrong?

I have 2 Matrix fields in an entry type, both of which use Dropdown fields:

Matrix: urls
    address (block type)
        context (dropdown field values include 'own')
        address
        urn

Matrix: logos
   svg (block type)
        usage (dropdown field values include 'monoNeg')
        aspectRatio
        svg (source code)
   img (block type)
        usage (equivalent dropdown field)
        img

Entries are assigned to a footer Globals field, from which I'm pairing a urls value with a logos value in a loop to write linked logos.

I can get the relevant URL easily enough with:

{% for org in footer.footerAccreditations %}
    {% set orgUrl = org.urls.context('own').one() %}
    {{ orgUrl.address }}
{% endfor %}

Which prints the address URL just fine.

But the same approach for the svg logo isn't working. Either one of the following returns 0, even when I know for sure that the org entry in question has a monoNeg SVG source.

{% set negLogoDirect = org.logos.usage('monoNeg').one() %}
{{ negLogoDirect|length }}

{% set negLogoTyped = org.logos.type('svg').usage('monoNeg').one() %}
{{ negLogoTyped|length }}

If I run through an all loop for the logos their usage reports exactly as I would expect:

{% set orgLogos = org.logos.all() %}

{% for logo in orgLogos %}
    {{ logo.usage }}
{% endfor %}

I assume I can make my template more verbose and get what I need, but I don't see why the same approach should work for one Matrix dropdown field and not for another.

Where am I going wrong?