S7 Edge Loading and Buffering issues

[AC Question]

So I had a Note 4. Been testing it against my S7 Edge.

Refreshing FB and IG in app.
S7e: Sometimes takes a while to do it. See bunch of "unable to connect" or something errors.
N4: No constant issue.

Listening to iHeartRadio or Samsung Milk.
S7e: Buffer issues and sometimes need to press the stop button and restart it to get it going again.
N4: No constant issue.

Watching Youtube or Netflix.
S7e: No constant issue.
N4: No constant issues.

Trying to see if its a OS or phone issue or something else. I do notice it usually acts up only when im on WiFi.