Like Notifications are clearing without viewing the Post

FWIW, average likes per day for the top 50 users on meta this past week:

 23.1,
 21.4,
 10.3,
 8.9,
 8.4,
 6.9,
 6.7,
 6.6,
 6.3,
 6.1,
 5.3,
 4.4,
 4.4,
 4.1,
 4.0,
 3.9,
 3.6,
 3.3,
 2.9,
 2.9,
 2.6,
 2.3,
 2.1,
 2.1,
 2.0,
 2.0,
 2.0,
 1.9,
 1.9,
 1.9,
 1.4,
 1.4,
 1.4,
 1.3,
 1.3,
 1.1,
 1.1,
 1.1,
 1.1,
 1.0,
 1.0,
 1.0,
 1.0,
 1.0,
 0.9,
 0.9,
 0.9,
 0.9,
 0.9,
 0.9,
 0.9