collectionUpdate mutation in GraphQL takes Collection out of sales channels

Shopify Plus
1

My collection is available in 6 sales channels (refer attached screenshot) then I perform collection update using GraphQL mutation (collectionUpdate) which does nothing other than just updating description of the collection. After this, my collection is only available in 2 out of the 6 sales channels. Confused why and how to fix this.

{
  "query": "mutation collectionUpdate($input: CollectionInput!) {collectionUpdate(input: $input) {collection {id}userErrors {fieldmessage}}}",
  "variables": {
    "input": {
      "descriptionHtml": "description - new",
      "id": "gid://shopify/Collection/<

![Screenshot 2023-09-14 at 1.51.07 PM.png|455x283](upload://hgFSbFRGuFQMnVNkXvOSikF0nIS.png)

![Screenshot 2023-09-14 at 1.54.07 PM.png|312x280](upload://g1mw0OkvNyuBRE5YXoxG1WzwkvA.png)