This has been around for a while, but I'm not sure it has been reported.
When you check another player's profile, you can now see the overall progress (warframes, weapons,etc. and it's corresponding mastery points) for everything except "Missions" (nodes unlocked) and "The Steel Path Missions", where it shows 0 points on both lines. Those 2 lines only get populated, showing the correct amount of mastery points, if you check your own profile.
To make it clear: I'm talking about the "Mastery Breakdown" list that pops up when you move the mouse to the "mastery rank" on the top right sid