correct array structure of subscribedEvents

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #1680
| Refs tickets  | -
| License       | MIT
| Doc PR        | -

array structure was overwriting array keys and only leaving the final key as a value.