Hi, there is apparently an issue with the json_encode function in NTT on versions below 9944. It prevented an array from being turned into a string properly for the ID, since it thought one of the array's items was null instead of the mutation my mod chose. This only happened with patience for whatever reason.
I've applied a fix that should work until >= 9944 is public and replaces the latest itch.io NTT build. Thanks for letting me know about this!