I put that in a pull request for 2.50.x for the present. Thank you @Saffith for the quick fix, and thank you @Lunaria for the report and the example files.
https://github.com/ArmageddonGames/Z...assic/pull/129
Needs to be applied to master too, but a lot of this is different, there. I will be doing a re-merge of my local and fork assets in a few days to synchronise.