matroskademux : can no longer seek right after the no-more-pads signal

We have a custom gstreamer plugin that uses matroskademux internally and requires the demux element to seek as soon as it can. We are currently handling this by performing the seek immediately after we receive the 'no-more-pads' signal from matroskademux. It appears this behavior is no longer supported (in v1.14.4) since changes related to this enhancement..

It was my understanding that if the element was in the PAUSED state and all of its pads were created, then it was safe to seek on the element. If this is not the case, what is the best method for finding the earliest time to seek on an element?