I'm not sure how to exactly explain the issue. It seems like while on WIFI some syncing or the receipt of push notifications is not happening properly. This is most noticeable to me with a application called SharpTools. This app subscribes to SmartThings changes via an API. I have noticed that while on Wifi, I am not receiving these updates. However, If I turn off Wifi, everything is working properly.
It is very easy for me to replicate the issue, So I am sure it is a bug in the Android Marshmallow update. I can confirm that Wifi is working fine by going into Youtube. I can then force a change that should be picked up via SharpTools and the Smartthings API. However, with WIFI on, these updates are not received. If I turn off Wifi, then everything seems normal.
This issue seems very similar to the issue we had with the Lollipop update. In that case, I had to keep Wifi turned off for several months until it was fixed with another patch.
Is there another place where I can report this type of issue in order to make sure that it is fixed?