Version

2.5.2

Reproduction link

https://jsfiddle.net/CHENGKANG/4owjvLLk/5/

Steps to reproduce

1. Add multiple custom event listeners

this.$on(['event1', 'event2'], () => {
    console.log('This is callback.')
})

2. Try to remove them with vm.$off

this.$off(['event1', 'event2'])

3. Try to emit the removed events

this.$emit('event1')

What is expected?

Nothing should happen because the event listeners should have been removed.

What is actually happening?

Got "This is callback." printed in the console, which means that the event listeners are not removed as expected.

Please check my post in Vue forum for more details.