Cypress seems to ignore the specPattern option in cypress.config.js

[paul9115]

I'm seeing an issue when setting up my cypress tests and attempting to configure spec patterns (I'm using the cucumber plugin and want to limit spec files to .feature files.
In my config I have the following:

e2e: {
        specPattern: 'foo/bar/*.cy.{feature,features,api.js}',
        baseUrl: '<URL>',
        setupNodeEvents(on, config) {
            on('file:preprocessor', cucumber());
            ...

However, when running Cypress and checking the specs everything is listed and the options show that specPattern is set to **/tests/**/*
No matter what I set this glob to the default value is used instead.
Other options such as baseUrl are working as intended and the config in settings shows specPattern is being set from the config