Plugin resources are loaded from mattermost domain disregarding context path

[akomakom]

I have a Mattermost server behind nginx with a URL with a context path, eg https://MY-DOMAIN/mattermost/ (and Mattermost works fine)

When mattermost loads, I see the following URL in developer console with a 404:
https://MY-DOMAIN/plugins/com.github.matterpoll.matterpoll/api/v1/configuration

But it should be:
https://MY-DOMAIN/mattermost/plugins/com.github.matterpoll.matterpoll/api/v1/configuration

I am using the recommended nginx proxy configuration which does not cover /plugins (nor should it). Since I have a context path, my nginx location block is set to location /mattermost { .... The mattermost system console has the site url set with the context path.

Wrangler commands still work, but the UI does not load. I've attempted to temporarily add /plugins to the nginx proxied URLs, and the resource is then loaded correctly. I still did not discover any Wrangler UI (but I don't know where to look).

• Mattermost Server 7.5.2
• Wrangler Plugin 0.7.0