Listing tabs in a channel encounters "Value cannot be null. (Parameter 'stringToUnescape')" error

Hi,

We use the List tabs in channel API in our product, and it works fine for all cases, except one.

We notice that when sending this API with one of our customer's channel, we will get the following response: 

{
    "error": {
        "code": "BadRequest",
        "message": "Value cannot be null. (Parameter 'stringToUnescape')",
        "innerError": {
            "code": "InvalidRequest",
            "message": "Value cannot be null. (Parameter 'stringToUnescape')",
            "details": [],
            "date": "2024-05-10T01:38:38",
            "request-id": "10e6b074-a2dc-4950-aae5-8bbe68d838b8",
            "client-request-id": "10e6b074-a2dc-4950-aae5-8bbe68d838b8"
        }
    }
}

No matter we tried how many times, this error persists.

For comparison, if we send the same API on another channel, we can get correct response.

Do anyone also encounter this error?

We hope Microsoft could help us figure out why and how we can handle this case.

Thank you.