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First, the “Not Seasonally Adjusted” Civilian Labor force shrank from 153,022,000 in March to 152,898,000 in April for all persons 16 years and over!
Second, the Civilian noninstitutional population age 16 years and older increased from 239,000,000 in March to 239,146,000 in April.
Now, to rational people, that’s a really odd divergence.
Is it? Have you checked with a rational person?
The labor force declined in previous reporting periods so why would "most" people have expected it to increase in this one?
If it's age 16-65 it's an problematic divergence (people doing an extra semester of college or watever), not just over 16 years old.
Male Labor Force Participation rates are lower in the US than any OECD country.