Constantin: monitor effort drift against your session average
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@Stavrogin I’m sorry to hear that. The real issue is that I’m unable to debug this app on V2 as the only way to do so would be to have access to real hardware and logs and I only have S9PP and Race S. I suspect there’s something wrong in current V2 firmware as it doesn’t crash on older watches - or I haven’t experienced it yet.
What activity did you try it on? Did you have other features turned on like guides or routes.
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@Łukasz-Szmigiel Thanks for reaching out.
I was doing a Trail Run with a workout Guide on. Nothing else. No Routes. I had a Polar HRM attached.To your point the HexHunter much the same thing. It was a crasher for me.
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@Stavrogin thanks for extra info. A guide is de facto an S+ app. So you had Constantin + Guide (2 apps). But it shouldn’t crash the watch nevertheless. Suunto watches are pretty clever and if they see that there are no resources left, they will kill non essential apps, it’s hard to crash the watch and the latest version is simplified.
I’ll do some more digging into optimising the issue but the problem is that on S9PP when I’m using navigation and 2 S+ apps, current version doesn’t hit the limit. I’m surprised that the issues happen on V2 which is newer hardware.
Perhaps @suuntopartnerteam can shed some light on it?
But just to clarify - it didn’t crash at the beginning of the run but later, when you were cycling the screens, right?
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@Łukasz-Szmigiel That is correct. The freeze and reboot was triggered by cycling through screens. I feel like that was what happened with the HexHunter app as well.
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@Stavrogin it seems to me that the UI is still too heavy and, perhaps, tries to do all the painting at once after the screen cycle. I’ll let you know after I release a new version with delayed rendering and we’ll see if it helps.
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@Stavrogin new version should be available now in SA, you may want to give it a try. The code is ~25% smaller in general and there are some additional optimizations added to how the UI drawing is being handled. If that still crashes - I’m afraid I can’t do much without the support from Suunto or logs from V2 running the app

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@Łukasz-Szmigiel thanks and I will give it a try
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@Stavrogin Did you enable or disable Always-On Display during activities?
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Hi everyone, I’ve also been testing Constantin because I’m interested in its setup. I have a V2 and initially started with 3 Suunto Guides (too many, several were faulty), then I switched to 2 Constantin guides and a 3rd grade training guide… also… the watch would freeze or the Constantin screen option would remain BLACK.
If you also use it in conjunction with ZoneSense, it also fails. I don’t think there’s compatibility yet with multiple systems (3 guides + activity and data watch) working outdoors… Suunto could refine these guide options, which are, in my opinion, quite interesting. Thanks, Luckas
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@Elmiuel thanks for your report. If you haven’t - check the current version (updated yesterday in the evening) - I’m getting reports that it’s more stable on V2.
When the particular SuuntoPlus app goes dark it means the watch unloaded it. You can confirm it by going to workout settings during the workout and checking active apps - the uploaded apps should be off.