Drawing inside a group...vanishes

When I create a new group (Command+G) and then draw inside it, the drawing disappears as soon as I lift my pen. If I exit the group the drawing will appear in a group on the timeline. I'm able to re-enter the group and draw normally but this is severely inturrupting my work flow. 

This is an intermittent issue, but I'd say it happens more than 50% of the time I create a new group.

I've never had this issue in any previous version.

Thanks for any help or suggestions!