In the player list are absorption hearts instead of health boost hearts.
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is duplicated by 2
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Comments 2
It's a design choice that absorption hearts aren't properly displayed on the tab list; it's information about other players that I don't think you should know about. However, anything more than 10 hearts are shown as special because otherwise it's very hard to see at a glance that there are a high amount of hearts.
Confirmed in 1.8-pre1.