This issue I have discussed previously in https://avalondock.codeplex.com/workitem/15976.
In AvalonDock there are few calls to Dispather.BeginInvoke with priority set as Background. This causes lot of unpredictable behaviors. I believe this should be at least Input priority.
I do not know how long you will take to fix this issue because after the AvalonDock project is overtaken it takes about 6 months to get new bug fixes, which is really bad. If there is any possibility please fix this issue and post to open source code.
In AvalonDock there are few calls to Dispather.BeginInvoke with priority set as Background. This causes lot of unpredictable behaviors. I believe this should be at least Input priority.
I do not know how long you will take to fix this issue because after the AvalonDock project is overtaken it takes about 6 months to get new bug fixes, which is really bad. If there is any possibility please fix this issue and post to open source code.