Norrie
Hi Guys
@ Bub it is not intended behavior... It is not doing it with X2 only X2a and ive been able to add any soft synths in on the fly untill now. ( I used reaper and no isses there either )
This is a hang on any synth on new projects and old only in X2a when I try and load them if a track is playing or not :(
Support have taken a system info file and are looking into what is causeing the issue as they have said they have never seen this before and cant recreate it at there end.
Once I know more I will let you know whats causing it
Norrie
How's this for a quick response?

. I was just logging in when I saw your post, it said '0 minutes ago' . :)
Well, I've just been living with it because I assumed it was buffering or something in the background so the audio engine wouldn't drop out. If tech support is saying this is not how it is supposed to work, then that's a problem I guess. It's only a few seconds, and is annoying, but it's not a showstopper by any means. Although ... I've seen a few complaints about it and one member said Sonar locks up completely and he can't add a synth any more.
My specs btw: X2a Producer x64 only, i5 750 Quad Core (Not O.C.'d), 4GB RAM (Not-O.C.'d), M-Audio Fast Track Ultra, 2-7200RPM HDD's, GeForce 9500 Vid, Samsung PX2370 Monitor.
Did you ask Tech Support what they are running it on, I'd love to get my hands on one of those DAW's that they can never seem to get Sonar to malfunction on.