YouTube and marshmallows don't work

[Altamimi7]

I just upgraded my M4 aqua to Android 6.0.1, now YouTube app gets deleted when ever I restart the phone, why, ?

[Altamimi7]

yes

i tried to role back youtube to the old one, and i found out that i don't have it.. so still i have reinstall youtube app everytime i restart the phone.  its that bad 

[Chronis14]

Any comments dear Sony??

[vinayk]

I updated my Sony Xperia m4 aqua dual from lollipop to marshamallo (6.0.1). Now whenever i restart my phone Youtube gets removed. I checked in apps also but its not showing there. So, basically on every rstart i have to reinstall Youtube wheich is very embarrassing.