Also, the groove clip routine is fairly notorious for misinterpreting the beats in a clip.
For this reason, I like to right click on the clip, and open the groove clip screen.
If your selected clip is 8 measures in 4/4 time, you know you have 32 beats in the clip.
Check the Beats-in-Clip box. If it shows 32 beats, you are good to go.
More often than not, it will show something strange, like 27.
Change that to 32, and away you go.
You shouldn't have to restart Sonar to use this. That seems kind of odd.