@CFrits: there was a commit recently to acc module (471dea4941f044e4a1489bf6f1dbb7297341a3fb) to set again the types for vals, maybe some regressions was introduced by it or is some other commit that change it from 4.4 to 5.5, there are many releases in between (at some point in past the message was cloned by acc to avoid conflicts with pkg/shm parsing).
You can create a pull request with the change that you think is going to fix it and we will review and merge it if looks good.