For layer Z rotation issue, try:
https://kindeyegames.itch.io/c3-3dobject-alpha/devlog/784817/fix-zelevation-hand...
Viewing post in Construct 3 3D Object, Rotate 3D bugs comments
Also for rotate 3d w/ layer z elevation:
https://kindeyegames.itch.io/construct-3-rotate-3d-behavior/devlog/784822/fix-ze...