Serious pool swimming issue
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@isazi share it with me
Opinions expressed are solely my own and do not express the views or opinions of my employer
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I cannot fix the root cause in the watch, but export to FIT files (and Strava) should gracefully handle the corrupted records. At least to the level when no intervals have abnormal duration.
To fix broken workouts in Strava you need to delete it, export FIT file from Suunto App for the workout and upload it to Strava
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@isazi sent, thank you for the help.
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Hi,
I’m experiencing the same issue today. I went swimming for 1,850 meters, and the activity duration was around 59 minutes. However, after finishing the workout and checking it in the Suunto app, the distance, pace, and duration are all showing very incorrect values.
I also noticed that the pace is currently not showing in the Suunto app at all.
Hopefully this can be fixed soon. Thank you!!
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@pavel.samokha done, shared in Teams
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Hello! Having the issue since last 2.56.18 - about weeek and something
Obviously there is a critical software bug but have no ode why it is still not fixed for such long time, in my view such critical problems should be resolved in a day or at least two but not weeks… -
@skobelev.np This won’t be fixed in days or weeks. Suunto releases a new firmware update every 3 months. And it’s only been a month since the last update. Unfortunately
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@runyx17 I’m not sure that’s the case.
There was a glitch with the Suunto 9 Peak Pro a while back that was fixed via a quick update within a month. -
Hi,
Having the same issue with my Vertical 2, distance is calculated correctly during my lap swim, but when I complete the activity the distance changes and pace and duration of activity are completely out of whack. Please FIX!
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I have the same issue since 10 days.
I sent a mail at the Suunto support.
I hope this bug will be fixed soon. -
M microniko referenced this topic on
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Reported bug looks like it needs a watch reboot. After 24days of no reboot it appears. Known and under fix. For now reboot the watch via 12s upper button.
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Hello, same issue here on my Suunto Race 2 (firmware 2.56.18]), three swim sessions in a row now where the saved distance ends up way lower than what I actually swam, plus garbled interval durations like others are seeing.
One thing that might help, the corrupted “total_timer_time” values in my .fit export aren’t random, they’re always just above 2,147,483.648s ==> exactly 2^31 ms.
Classic 32-bit overflow ? Subtract that and the durations line up perfectly with the good lengths, so the data’s still there, just wrapping wrong somewhere.Already emailed support with a sample file.
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@clement.cassiet yeah, that equates to the 24 days @dimitrios-kanellopoulos talked about…
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Any ETA not fix? This is showstopper for swimmers. Suunto need to improve in testing. Some time ago also similar issue after software update but with skiing…
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Hi, Suunto Race 2 user, exact same issue. the 596 interval appears on the watch during the session., 3rd swim in a row - GPS on or GPS off, same issue It seems to baulk through the swim, lap counter and duration seems correct throughout the swim, as does overall distance. But you can see the interval 596 showing up, and you can see the watch is not any longer able to handle the intevals. Distance is correcgt at the end of the swim, then the Suunto app file is corrupted in several ways.
DUration Good, Distance only 60% recorded; heart rate and stroke rate seem ok.Interval laps are clearly broken.
Last seim for me was a 5x200metre freestyle. it recorded a 1x150;1x250; 1x150; 1x100, each one 596.33 minutes long. Strava also has a field day with the data.
I know what I swam, but anyone who sees my Strava now will be forever turned off switching to Suunto.
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Lap Distance Time Pace HR
1 50 m 596:32:18 1193:04:36 /100m 105 bpm
2 50 m 596:32:14 1193:04:28 /100m 106 bpm
3 50 m 596:32:14 1193:04:28 /100m 112 bpm
4 50 m 596:32:20 1193:04:40 /100m 116 bpm
5 200 m 0s --:-- /100m 126 bpm
6 150 m 596:34:16 397:42:50 /100m 131 bpmEvery swim, last three swims.
Needless to say, the Garmin users are having a field day and any triathlete contemplating Suunto, its likely very turned off by seeing this in my Strava feed for three consecutive swims.
I have tried GPS on and GPS off - no difference.
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Same issue here. During swimming everything looks fine. Afterwards total distance is lower, together with the wrong interval times of 596 minutes.
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This should be fixed in the hotfix release that is coming to your watches between today and tomorrow.
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Hi, exercise today without any problems
Sw. 2.56.18
Android 6.12.7
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A new relase is aviable :
*Release notes
2.56.28
Staged update starting on August 31st, 2026
This update improves software stability and includes several bug fixes
Improvements:
Improved overall stabilityFixed an issue where pool swimming distance and duration could be displayed incorrectly in certain scenarios*
I hope this will correct the bug !
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