Changing Swatches to Drop-down does not remove swatches from existing products

[expgabe]

Preconditions

1. Magento 2.2
2. CentOS Cpanel 66.0 with Engintron Nginx for cpanel, Apache 2.4.28, MySQL 10.2.9-MariaDB , PHP 7.0

Steps to reproduce

1. Login to Admin got to Stores -> Attributes
2. Change Attribute's Catalog Input Type from Visual Swatch Swatches to Dropdown
3. Clean cache
4. Existing Configurable Products view does not change to Dropdown

Expected result

1. All swatches should be removed and replaced with a drop down.

Actual result

1. [Screenshot, logs]

[magento-engcom-team]

@expgabe, thank you for your report.
We've created internal ticket(s) MAGETWO-82705 to track progress on the issue.

[adrzz]

Magento 2.2
Same error in new products.

[adrzz]

TEMP FIX

I replaced the code from module swatch (VIEW) with the drop-down file view.

Swatch file:
/vendor/magento/module-swatches/view/frontend/templates/product/view/renderer.phtml

Drop-down file:
module-configurable-product/view/frontend/templates/product/view/type/options/configurable.phtml

Steps to fix (TEMP)
Copy code from
module-configurable-product/view/frontend/templates/product/view/type/options/configurable.phtml

Paste and replace all code to file
/vendor/magento/module-swatches/view/frontend/templates/product/view/renderer.phtml