Error trying to realize TKB using REST

DISCLAIMER: This used to work.

 

On our community (which I believe is at either 12.08 or 12.09), I'm seeing this error trying to realize a TKB:

 

Array
(
    [response] => Array
        (
            [status] => error
            [error] => Array
                (
                    [code] => 100
                    [message] =>
      
section.list_order: section.list_order.title: This value must be shorter than 2,048 characters in length.
    
                )

        )

)

Nothing in my request comes close to 2048 characters.  Here is my request:

 

POST https://community/restapi/vc/boards/id/support/tkb/realize

 

tkb.title=Company%20Support

 

The weird thing is, after this error, the TKB is realized.  It has the right title and everything.  Why is the error being thrown?  Thanks.