James, have you tried to replace graphic driver? I think Sonar is not directly responsible for plugin redraw.

Piotr
James, have you tried to replace graphic driver? I think Sonar is not directly responsible for plugin redraw.

I've had similar problems with Kontakt and also Jamstix 4 when running Sonar on my laptop.
 
The issue turned out to be some conflict between the NVIDIA graphics card and the internal Intel graphics card.
 
Once I forced Sonar to ONLY use the Intel graphics, all the problems went away.
 
M.

I cannot remember exactly, but wasn't DPI scaling added to SONAR at some point? Some of that looks like a redraw error from a non-default DPI, but I would not expect that to affect the text at all. The text weirdness leads me to believe that there might be an issue with the CWP file itself, like SONAR passed a preset to it, but was corrupted.

Rasure's issue above looks exactly the same. It looks to me like an issue with rendering UI's that have tabbed windows - graphical elements from multiple tabs are appearing together. 
 
I keep my drivers up to date all the time. In addition to this, if I load a fresh instance of Kontakt with Strummed Acoustic in the same project, it's fine. The broken instance was fine before I turned it off in the synth rack. I'm sure that there are still issues with the synth rack - I've always used it a lot, and there used to be a ton of instability and weirdness associated with turning synths on and off. I think Noel did a lot of work to improve it at some point, which did seem to fix the problems with Sonar crashing or freezing when toggling synths, but it seems that there still may be some problems. 

CakeAlexSHere
?
Had a party tonight till 4am and it was the old addictive Keys, AD drums and Kontakt vintage keys. No issues whatsoever..

On Studio One.

Biting satire 

Native Instruments seem to be moving their plugins towards more modern OpenGL libraries, I would not be surprised at all if it is related.

You could try removal of the display adapter driver reboot and reinstall. If you have Nvidia I think you can also Google up a utility that will also search for old DLL's and registry entries (full cleanup after uninstall). May be similar utils for other cards around.

bot

I can reproduce the graphics problem by inserting a Kontakt instance without letting SONAR create any output tracks for it and then adding Strummed Acoustic. The GUI is messed up as shown in the OP, but as soon as I assign an output track to any of the Kontakt instance's outputs in SONAR, the GUI automagically fixes itself and stays fixed even if I later delete the output track.
 
I've seen similar odd GUI behaviour in other Kontakt instruments too when no output tracks are defined. For example, Scarbee Rickenbacker's menus are all but unusable in my setup until I assign an output track to the Kontakt instance. It doesn't make much sense to me, but that's how it appears to be.
 
I have no idea though why it would happen when a synth is reconnected or unfrozen nor how to fix it easily, sorry.

happens all the time to me.  maybe its for the best this product is now in the garbage... where it belongs.

What happens if you delete the old instance and insert a new instance with the same preset? I don't have these problems and I use Kontakt a lot. However, I'm still on Komplete 9.