Animation slow down in Unity 5.5

Unity Engine
1

Updated to Unity 5.5 and now all my skinned mesh animation is running extremely slowly in the scene window…
Once I hit play in the game window everything plays just fine…
anyone else getting this problem?

EDIT: Toggle between the dopesheet and curves in the animation window improves the playback speed considerably… WTF?
doing some online research and looks like people have had similar problems with earlier releases…

2

Can you report a bug with your files please?

Just in case this is a use case we’ve missed. We made specific efforts to speed up the animation window in 5.5

3

Yes, will try to send you a bug report when I have the time - presently up against the clock with deadlines etc…