Unable to enable sysevent

Forms 14.1.2 JDK 21

When defining a system event (p.e. type System notification) with Auto subscribe YES it is possible to unsubscribe it with set_event_object_property('…..',EVENT_ENABLED,PROPERTY_FALSE);

But enabling it isn't possible.

You can reproduce it by making a simple form:

With the following code

:info := 'Event SYSNOTIFY';
:info := :info||chr(10)||'Current status:'||get_event_object_property('SYSNOTIFY',EVENT_ENABLED);

set_event_object_property('SYSNOTIFY',EVENT_ENABLED,PROPERTY_FALSE);
:info := :info||chr(10)||'Status after set to False:'||get_event_object_property('SYSNOTIFY',EVENT_ENABLED);
set_event_object_property('SYSNOTIFY',EVENT_ENABLED,PROPERTY_TRUE);