cruse control drops out

I am on my second 2000 Buick Regal and really like this car but on both of them when the left turn signal is engaged even just slightly for a lane change the cruse control drops out. Pushing the resume switch engages it again and away we go. This happens about 7 out of 10 times. I am wondering if anyone here has had this problem and what was done to correct it. I think this is great site and thanks for letting me post. Playguy.