Server Error when upserting existing and non existing documents

Hello there! Im currently experiencing issues with the not so long ago officially announced upserting funcionality. Im running appwrite 1.7.4 self hosted and node-appwrite 17.2.0 on nextjs15. Everytime i want to use the upserting function, im getting the 500 general_unknown error. This happens if neither document exists or not. Even with a dummy table and dummy data it wont work (code below)

export async function testUpsert() {
  try {
    const { databases } = await createSessionClient();
    await databases.upsertDocument(APPWRITE_DATABASE, "test", "test-id", {
      test: "test",
    });
    return { success: true, message: "test_complete" };
  } catch (error: any) {
    return { success: false, message: error.code.toString() };
  }
}

And that's the console output from the backend container, when upsert the test document

[Error] Timestamp: 2025-09-12T10:06:01+00:00
[Error] Method: PUT
[Error] URL: /v1/databases/:databaseId/collections/:collectionId/documents/:documentId
[Error] Type: TypeError
[Error] Message: array_unique(): Argument #1 ($array) must be of type array, null given
[Error] File: /usr/src/code/vendor/utopia-php/database/src/Database/Document.php
[Error] Line: 85

Creating and updating data, via their designated functions works fine tough. Ive seen another thread where someone experiencied this issue, but he was using the cloud saas version of appwrite.

Is this issue about to be fixed and maybe released soon?

Would be nice if someone knows, if im making something wrong or if this issue is about to be fixed in the near future.

Thanks a lot in advance!