Cannot get transformItems to work at all with <MenuSelect/>

Hi - I can’t for the life of me get transformItems to work on my widget…every time I have the prop, it causes my site to hang and just gobble up a ton of memory. Currently using reactinstantsearch v4, serverside rendered. Here is the demo code:

                    (items) =>
                      (item) => {
                        item.label = `${item.label} TEST`
                        return item

Also, on a separate note, is it possible to save the currently faceted value from a like this to state? Or is there a getFacetValue() function of some kind? Would want to use it elsewhere.

Help please! Thank you!