VivoActive 5 stopped tracking sleep and body battery after first full charge

Have the VivoActive 5 for 1,5 month now. After the first time I charged it fully Saturday evening, it doesn’t track my Sleep score and Body Battery anymore for two nights in a row.

There’s just no score at all in the morning routine, and when I look it up, it says it hasn’t tracked anything.

Does anyone have an idea?