circpadding: Middle node did not accept our padding request

While trying to get logs for legacy/trac#30992 (moved), my client started emitting those:

[warn] Middle node did not accept our padding request.

The context is that a normal client (git master) is trying to reach a service that is under heavy load as in quite unreachable.

I've managed to catch info logs of this from the bootstrap of the client up to the warning.