iOS 9.0.2 bug on contacts app

hello guys

i have an issue with my contacts on iphone 6 with ios 9.0.2 installed, when i hide a group (in this case my gmail contacts group) on iphone's stock contacts app, after closing the contacts app and reopening it, the hidden group is visible!!! ios 9 doesn't remember my settings for it, does anybody else have this issue or it's just me?😕