Product channel is not updated with multiple languages

[gkielwasser]

Updating the channel of the product is not fully working.

Steps to reproduce the behavior:

prerequisite:
create 2 channels ("A" and "B")
create 2 languages (default "en" and an additional language "fr")
having at least one product

1. assign the product to the channel "A"
2. search products on the channel "A" using appropriate token and the language query parameter: /shop-api?languageCode=fr The product is visible.
3. update the product channel switching from channel "A" to channel "B".
4. search again the product to the channel "A" using the previous query. The product is still visible.

Additionnal information:
Searching products removing the language query parameter works well: the product is not visible anymore.

Expected:
The product should not be anymore visible on the previous channel independently of the language used.

Environment (please complete the following information):

• @vendure/core version: 1.0.0
• Nodejs: 14.16.1
• Database: sqlite