https://i.gyazo.com/758c853ad8be6b084e738f40e65be051.jpg
As the image shows, Oakheart’s Reach mastery shows it costs both 5 and 7 points – 5 under the locked icon, 7 icons at the right.
Before the patch it displayed as a cost of 5 with no discrepancy, so I hope the 7 is an error, especially as it would be highly unfair to raise the cost for players that come along later.