Dispatching multiple actions in parallel throws an error

According to the docs, it should be possible to dispatch multiple actions in parallel by passing an array of actions to the store:

// dispatch multiple object in parallel
socrates([
  { type: 'change:name', payload: { name: 'an' }},
  { type: 'change:age', payload: { age: 26 }}
])

But when I attempt this, I get the following redux error:
Error: Actions must be plain objects. Use custom middleware for async actions.

My code:

const slots = { /* a plain object */ }
    , exceptions = { /* a plain object */ };

store([
  { type: "set:slots", payload: slots },
  { type: "set:exceptions", payload: exceptions },
]);

Running each action individually works without issue:

store("set:slots", slots);
store("set:exceptions", exceptions);

Start by reproducing the array-dispatch example from the issue and trace the store's dispatch entry point. The fix is done when multiple plain-object actions dispatch without the Redux error while the existing individual action calls continue to work.