There is no update at the moment. I’ve updated the ticket, but that does not guarantee the issue will be addressed any more quickly.
You are correct that this is a material issue with them being assigned to the mesh. It only appears to be the interior material that I can see as well.
If this is fixed, it will be a major release (ie. 4.9, 4.10, etc), which only release every few months, vs a Hot Fix (ie. 4.8.1, 4.8.2, etc), which do not have definitive releases.
As soon as there are any updates to the ticket I will post here.