I can confirm that, but I don’t know what’s at the root of it.
DT 3.9.4, macOS 14.2.1
@cgrunenberg might have an idea. Also: The scripting dictionary says:
Reminder Object [inh. Item] : A reminder of a record. Use the command 'make new ... with properties {...} at ... ' to create new reminders.
which is not how the make command is used here (nor in the samples I found in the forum). Instead, make is called as a command on the record itself (i.e. with tell record to make…), no at parameter used.
And I have no idea how to use all this with JavaScript. rec.make({new: "reminder"}, withProperties: {…}) throws an error as does rec.make({new: "Reminder"}, withProperties: {…})