Right click to isolate clip in track view not working after 2017.07

Last night I updated to the early release 2017.07. All was fine until I tried to right click in the track view to isolate a clip. The lasso would render for less than a second and then the right click menu would render instead of isolating with the lasso. May be I'm doing something wrong but that's the way I've done it for years. Has anyone else come across this situation?