LeaveFeedback fails with Error 63: "An error occurred. LeaveFeedback is temporarily unavailable."

Hi everyone,

Is there currently an issue with the LeaveFeedback call of the trading API? We are using the LeaveFeedback call of the trading api to leave feedback for buyers of FixedPriceItems, but a few days ago it stopped working for some reason, resulting in the below error response for every transaction.

This is the request we use:

<?xml version="1.0" encoding="UTF-8"?>\n
<LeaveFeedbackRequest xmlns="urn:ebay:apis:eBLBaseComponents">
    <CommentText>********</CommentText>
    <CommentType>Positive</CommentType>
    <TransactionID>*****</TransactionID>
    <TargetUser>***</TargetUser>
</LeaveFeedbackRequest>

and here is the response from ebay:

<?xml version="1.0" encoding="UTF-8"?>
<LeaveFeedbackResponse xmlns="urn:ebay:apis:eBLBaseComponents">
  <Timestamp>2021-05-28T12:54:41.638Z</Timestamp>
  <Ack>Failure</Ack>
  <Errors>
    <ShortMessage>An error occurred.</ShortMessage>
    <LongMessage>An error occurred. LeaveFeedback is temporarily unavailable.</LongMessage>
    <ErrorCode>63</ErrorCode>
    <SeverityCode>Error</SeverityCode>
    <ErrorClassification>RequestError</ErrorClassification>
  </Errors>
  <Version>1201</Version>
  <Build>E1201_CORE_APIFEEDBACK_19196963_R1</Build>
</LeaveFeedbackResponse>

The Error Code is 63 "An error occurred. LeaveFeedback is temporarily unavailable.", which seems to indicate that the feature is disabled by ebay at the moment. Transaction-IDs should be valid, as they work on other requests.

Anyone else having trouble? Or could this be some individual problem with the ebay account of the seller, like a current restriction or anything?

Is there any deeper explanation for this error than its long message?

Any hint where to look further would be very welcome :)