Harald I've updated my 4.1 installation with the latest version and now it works, however, trying to update this version with the 4.2 changes manually integrating the commit's changes you reference I found out that commit is already applyed in the 4.1 version, so, could it be another commit what I have to integrate?
At the moment, the spine objects are still animating out of frame when labeled as "Only Events" update (at least they do animate when vinsible), but the performance improvement is what we need to achieve.
Thank you very much for everything!