See above. The sidebar for the page interrupts the content of the message. I think this should be pushed below the content like the forum_list sidebar.
I tested this using the example page node on XFcom.
Samsung Galaxy S5 running Android 5 using Google Chrome 45.0.2454.84
Page nodes don't have sidebars - just the nav on the left and the content.
The Facebook widget has just been added using standard HTML/CSS (it's floated right).
I'm going to call this not a bug since it's related to the FB block that it added as part of the page itself, though I have tweaked the page node nav in narrow responsive views.
I'm going to call this not a bug since it's related to the FB block that it added as part of the page itself, though I have tweaked the page node nav in narrow responsive views.