Problem with CheckboxList and bulkToggleable

I do have a problem with a

CheckboxList

CheckboxList

CheckboxList

CheckboxList and

bulkToggleable

bulkToggleable

bulkToggleable

bulkToggleable in combination with

reactive()

reactive()

reactive()

reactive()or

lazy()

lazy()

lazy()

lazy(). When trying to bulk toggle the first checkbox always gets unchecked. Without

reactive()

reactive()

reactive()

reactive()or

lazy()

lazy()

lazy()

lazy() everything works fine.