Can not rebase or push updates to patches with different author

Hi, Up till not long ago it was possible to rebase or push updates to patches even if I was not the author of the patch, now I've noticed that when trying to do so I encounter "invalid author" error. For maintainers (especially in the stable branches) this is crucial and makes the cycle much shorter as no intervention from the original author is needed on trivial rebases, can you please restore the old state? Tal.