Enduro 3 HRV unbalanced since updating to 15.31

Post a screenshot of the HRV Status 4 week graph: https://connect.garmin.com/modern/hrv-status/2025-05-26/2

Click Overnight Averages to add them to the graph.

My graph and everything looks good after the update. It is even increasing slowly which is making my baseline increase in a healthy way.

My HFV is also lower than usual, although I have not changed anything about my routine. In addition, I feel great and my training performance has improved. However, I noticed these changes 3-4 days before the update. Nevertheless, I could imagine after your post that the update might play a role.

You didn't click the Overnight Averages button.

My bad

Your overnight average is going down so it looks like it is working like intended. My overnight average is going up and my HRV is going up.

HRV is a bit "magic" since you can't see it and not directly influence it. It is hard to know how it will change. I have a stress fracture in my foot since end of April. So, no running since then and that seems to have a very good positive effect on my HRV. 

here's mine as you can see average is within range but still unbalanced

HRV moves very slowly. Your overnight average was in range and the HRV started to go up. Then it went down again below the baseline.

Look at the 4 week values. 7 days is a bit short to see the real trend.