After the latest update (Halion 6.2.20) the String List variable in Macro Page editor doesn’t accept more then 9 entries.
I’m able to reproduce it here. Its now in our Defect-Tracking-System and listed as Bug-ID “HALLY-7799”.
I hope we can provide a fix for it soon.
Thanks for your report and please accept my apologies for any inconvenience caused.