UI bug in the game

Good afternoon! I faced the following problem. I’m making a cooperative card for 4 players. While I was testing alone, there was no problem. But when 2+ players appear, a strip of HP appears from above in the center. I did not include such functionality. And only one of the four players appears.
The “carrier” of the strip changes after death. I don’t understand at all, is this a bug or some kind of setup?

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