Preconditions:

• Added two attributes e.g color and integer
• Added product type based on attributes with selected an option 'Used for product variants' for both variants
• Added product

Steps to reproduce:

1. Log in to back office.
2. Go to Product catalog / Products / Product.
3. Switch to 'Variants' tab.
4. Click on 'Generate variants' button.
5. Add an attribute value.
6. Remove added attribute value by clicking on remove button.

Actual result:
See attached screenshot and watch gif: https://recordit.co/NUAgZsRHHc

Generate attribute variants form is closed when user remove an attribute value from the input.

Expected result:

The value of an attribute is removed and form is not closed.