Mastery score / Mastery level

Is it me? or the new update got some problems. My mastery score is 0 and my Mastery lvl 6 on jhin {{champion:202}} is zero. Most of the mastery is gone! can someone tell me the problem or solution to fix the problem.
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We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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