An update to Samsung Health that rolled out last week appears to have introduced a bug that makes step history vanish for some users.
Samsung Health step history bug
Users on Reddit have reported that historical step counts disappeared from the app after the update. Some said their step counts from before November 2 are no longer visible in the app’s history view.
The issue appears to affect only how the data is displayed: checking the affected dates in Daily Activity still shows the relevant step counts, indicating the update hasn’t wiped the data altogether.
It remains unclear what is causing the problem. Some of the affected users have theorized the bug may be related to the end of daylight savings time.

