Typing "]" causes "go back" action

I’m editing a massive list of media items and an ending “]” indicates that I no longer have the item in inventory.

Why does typing “]” + “Enter” at end of text causes “go back” action rather than just typing the bracket?
Also it only seems to happen every other time I enter the bracket on a line.

I’ve tried adding spaces before and after and moving the cursor away from the bracket.
I’ve turned off all auto-correcting that I know about.

I’m missing something simple, but what?

Never heard of that…

What do you mean with “go back” action?