I did not earn any percentage points yesterday

It is quite strange yesterday, as I did not receive any percentage points at all. At my Level (52), I have been earning around four percentage points per day ever since I reached 52, but yesterday I received none. I should have received four more points to reach 48%, and I was quite active on the site.

Has anyone experience not receiving any percentage points on yesterday?

Update: I noticed that I have earned a percentage point (44% to 45%), so it seems the problem is fixed.