Stairs are bug because we see dark bars on stairs that are positioned to the West / East.
here is an example : see the screenshot
MC-91721
Bug with stairs
Resolved
Duplicate
0
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-91710. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.