I believe that is an issue with most pre v1.6 cellar mods. I'm using another one right now, and the creator released an update to fix that.
Acerbicon seems be occupied with updating their mods, so it's possible the
Ace's Expanded Cellars (Content Patcher) mod will eventually be updated for 1.6 with the necessary fix. In the meantime, you can try using other cellar expansion mods. But if you want to keep on using Ace's Expanded Cellars, then I would recommend the (slightly cheaty)
Noclip Mode mod.