Odd behavior with space at end

[mfikes]

If I add a space at the end, it will allow me to press return, indent, and add to a list, but after the first character I type, it will move the ending parenthesis and place the cursor after, which is wrong if i want to continue typing

[mfikes]

Start with (let [x 3] |) where | is the cursor. Then tap return, space over and type y.

You then get

(let [x 3 
______y])|_

where _ is a space char.

[tranchis]

I've tried with Xcode 7.3 and 8.3, with iOS 9 and 10 respectively as targets, but I can't reproduce this behaviour. Any hint on how to get it happening?