Whenever I claim the rewards for hitting the required number of minutes read, the passive points don't work anymore.
(
As you can see, after I hit 120mins, the +5 points don't accumulate anymore. I noticed this problem last week, too, when I exceeded 900 mins.
At first I was meh, but then I decided to farm my way to get a cute avatar border, so I need all the points I can get. Hopefully this will be fixed soon.
Happy reading!