Operating System: Windows 8.1
Java Version: 1.8.0_161
When older worlds are opened in Minecraft 1.13 some doors are rotatetd and the top half is missing. The bug occurs from 1.8 onwars. Version 1.7.10 or earlier is not affected.
2018-07-22_17.05.05.png shows doors in 1.7.10
2018-07-22_17.03.28.png the same doors in 1.8 or newer