Crash reports collection Q1 2026

EzioAuditore

@sky-runner you might be on something here. I too was starting activity with wrong S+ (due to the fact it resets everytime you do a guide) and had a crash. now that I leave only one s+ (2 including the guide) I haven’t had restart.
There were a couple of times though that my watch crashed without going to the menu but I always had on route navigation!

skifast12

@sky-runner Interesting that your crashes (if I read it correctly) happen before you even start the activity? I would like to ask this group how much of their watch memory is filled up with maps? I recently downloaded a lot of map areas and then the crashes began to happen a few days later….thoughts?

Gilles D.

Hello @skifast12 , where do you check the % of used memory? Watch? SA?

Gilles D.

On SA :

But with almost 20 GB left on my Watch, it does not gives credit to your assumption

sky-runner

@skifast12 said:

@sky-runner Interesting that your crashes (if I read it correctly) happen before you even start the activity?

No, what I described is a crash during activity. I first start activity, then change the S+ guide while the activity is ongoing. That is supported. And, as I said, changing S+ app or guide doesn’t crash the watch on its own unless there is also on-route navigation in progress.

sky-runner

@Gilles-D. said:

But with almost 20 GB left on my Watch, it does not gives credit to your assumption

You confuse storage and memory - these are two distinctly different things. The watch has 32 GiB of storage but only 32 MiB of memory plus a few more MiB on the SoC. But anyway, I don’t think this is a memory issue. This to me seems like a race condition - software developers will understand what I mean. A race condition is when two concurrent CPU threads race each other when one is trying to mutate or delete some resources in a conflicting way, which may lead to an unexpected result. This is more likely in a multi-core CPU. These issues are notoriously difficult to reproduce and debug. They may be happening only one time out of thousand or one time out of million.

2b2bff

@sky-runner I second this. In my case it happend 3 times over 18 months or so.

Problem with those race conditions is that there is seldom something you can do to avoid them - on the user side.

Wilson75

My suunto vertical 1 crashed last weekend while manipulating suunto plus app.

Today crashed again while zooming out during my stand paddle activity (no Suunto app enabled) I sent the logs today.

Woodster

Hi @Dimitrios-Kanellopoulos

I’ve had the same issue with my Suunto 9 Peak Pro - happening mid workout and at the START screen.

I’ve contacted support but heard nothing back yet.

I suspect the 9PP shares a similar code base to the Vertical 1.

Let me know how I can send over diagnostics - I’m a developer so familiar with application support diagnostics.

Martin

2b2bff

@Woodster said:

Let me know how I can send over diagnostics

It is explained in the opening post of the thread?

Woodster

@2b2bff said:

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2b2bff
SILVER MEMBERS
about 17 hours ago

@Woodster said:

Let me know how I can send over diagnostics
It is explained in the opening post of the thread?

Race S

Yes it’s in there ta buddy - sent Suunto account details via chat.

For me the freezing issue is very likely a faulty garbage-collection issue with a SuuntoPlus app I wrote leading to RAM pressure, can easily reproduce and send logs over so that a firmware update can isolate any app issues from the actual watch.

jjorgemoura

Had a crash during my run today, using a Race 2. It crashed at just after 2Km into the run.
I had 3 S+ apps enabled (Cadence coach, ZoneSense and Running Economy) and was using a Polar H10 belt. Everything else were standard (no nav, battery on performance, feeling on, no music controls, etc).

When I realise the watch had crashed and restarted, I’ve started a new activity to continue my run. However, this time I unselected the ZoneSense app, while keeping the other 2 S+ apps and the HR belt. The remaining 10.4Km went well, no problems.

Hope this gets sorted soon by the team.

orzechszek

@jjorgemoura try to disable ZoneSense from your S+ apps. It seems it helps me with my Race S.

runyx17

I’m still experiencing random restarts on my Vertical 2. Yesterday, it happened three times in a single day. Fortunately, not during an activity. I have the latest firmware installed.
Question: Should I keep sending the logs, or is the cause of the problem already known?

Speed Man

Hi Suunto Team,

I encountered my first unexpected watch shutdown after updating to software version 2.56.18.

It happened during today’s run at 6.41 km while I was using SuuntoPlus Fused Zone together with a Suunto Heart Rate Belt.

Has anyone else experienced this issue? Is there a recommended fix or troubleshooting step? I’d really like to avoid this happening during an upcoming race.

Thanks in advance for your help Running_2026-08-02T06_36_26.json

elbee

@runyx17 said:

I’m still experiencing random restarts on my Vertical 2. Yesterday, it happened three times in a single day. Fortunately, not during an activity. I have the latest firmware installed.
Question: Should I keep sending the logs, or is the cause of the problem already known?

Yes, keep sending logs unit suunto confirms they know the cause.
And send an email to support@suunto.com from the same email address as is configured in your suunto profile. That way they connect the logreport with your bugreport in email.

stromdiddily

First crash for me today, Suunto Vertical 2. I know it was a crash because it showed up in the Suunto App with 0 ascent/descent…should have had close to 2k feet of each at the point of the crash.

Custom trail running, no suunto guides/apps, no route loaded.
Coros HRM

Logs sent 1:35PM CST (crash was a few hours earlier but long run today).

stromdiddily

Back to back days with reboots in the middle of an activity. Logs sent at 930ish CST.

Custom run mode
No suunto apps or guides
Coros HRM

I had just received notification of a phone call on my watch and had accepted the call with my Wings headphones FWIW. Looked down in the middle of the call and had the “Suunto” logo staring up at me from my watch.

REALLY hope there’s something coming to address this. Back to back days on long runs 5 weeks out from Wasatch 100 miler. Not instilling a lot of confidence.