I have a weird issue (not exactly sure if it is rooted in avalondock or maybe a combination of avalondock and Metro?):

I have a prism app, with MahApp.Metro and Avalondock.
The Modules are loaded as Layoutanchorables, since they are different plugins of the app.

Now to my problem:

If i dock a plugin seperately (so i have 2 panes), autohide it and pull it into a separate window afterwards, the app doesn't ever close. The window itself closes, but the app runs 5 threads, which never complete.

Steps to reproduce:

1. Dock one to the upper (or lower) part of the window, so you have 2 panes
2. Autohide one of them
3. Pull one out of autohide so it is a separate window
   At this point something goes wrong. When i close my app, it never stops running and always has this kind of threads running:

2 Monitor.Wait, 2 GetMessageW and one WaitOneNoCheck. I can't pull any Callstacks for these, nor do i know which part of the code started them.

Also docking this window again doesn't solve it.

I tried to reproduce it with the TestApp, but had no luck.
Does anyone have a clue where i can look?

Regards

Algorithman