Opening a mesh will randomly dock to main window

all mesh, after double click befor Always opened in new window, but in (4,7 pre 7) some of mesh its starting opening in new TAB BUT in main window, and some other like befor in new window, its like lottery, its not god,

i made video to show this, becouse its hard to explain witch details

LINK - - YouTube

Hey dev666rej-

In the video you linked it seems you were seeing this happen when opening different static meshes. Does the same thing happen with other editor types (blueprint/material/animation/etc.)? Also, does the behavior change from object to object or can it change when reopening the same object (if it opens in a new window once, does it always open in a new window)?

materials, textures - opened like this same,

editor opened in different windows concrete models (mesh), one mesh opened in new window, another in main TAB, its like engine see differences in mesh,

i notice one, every meshes, and material,textures, what i use in my project, befor Update from prev6 to prev7, editor open right in new window
, but every meshes, materials, everything, what i never used in my project in ver preview 6, its opening in main window TAB.

Hey dev666rej-

Thank you for your information and video. I have submitted a bug for this issue to our internal tracking database (UE-10133) for further investigation.

Cheers

Ok, Thanks

Cheers