rescript-lang/rescript-react#94 fixes the children type for <>, React.Fragment, React.StrictMode and React.Suspense by making it React.element instead of 'children.

This causes an issue with <>:

<> <A /> <B /> </>

now gives the following error without location:

This has type: array<'a> Somewhere wanted: React.element (defined as JsxU.element) 

The components React.Fragment, React.StrictMode and React.Suspense still work fine though, so it seems there is some special handling for <> in the PPX that needs to be adapted.