This change is now merged. In doing quality assurance, we have identified that it surfaces a number of Enketo bugs. In particular, there is at least one related to repeats that we haven't identified the root cause of yet.
The change is available at https://getodk.org/xlsform/. Please try it out with your forms and do let us know if any of them result in errors or unexpected behavior. We don't think errors will be common but the more information we get, the faster we can solve the problem.