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lower average DEEP SLEEP; algorithm change?

‎04-20-2026 05:50

‎04-20-2026 05:50

I track my sleep minutes daily in a spreadsheet to enable comparisons.  In the 4 months at the end of 2025, my Charge 6 showed an average of 79 minutes of DEEP SLEEP nightly.  In the first 3 months of 2026, the average DEEP has dropped to 65 minutes.  That is a 21% reduction in deep sleep almost overnight in a sample size of 90.  Has the algorithm been updated or modified?  Others experiencing similar alterations?  Other considerations?  Please advise.

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