Instinct crash and reboot during activity

Two days ago it crashed as soon as I started my custom weight training. As soon as it rebooted, it started again with no issues.

Oh yeah, luckily enough it does restart right where you left, but still it shouldn't crash in the first place.
I'm just wondering if it's a common issue, if it's a software based issue or of I should be worried about my Watch istelf and send it back for replacement.

My Instinct reboots during Navigation when any of Waypoint names in the Course is wrong. But it reboots when I approach the waypoint place, not random.

Interesting. What do you mean by "Wrong", exactly?

The waypoint name can be 15 bytes long. Garmin web connect.garmin.com does not allow names more than 15 characters long, but allows UTF-8  characters, which are 2 bytes long. So a name 15 characters long, containing one 2-byte character breaks the 15bytes limit. When Instinct tries to work with such name, reboot is the result.

  So waypoint names like GarminInstinct® ,  Mönchengladbach,  Champs-Élysées, Владимир, Ηράκλειο, etc. are "wrong".

I suppose that the web use "Null-terminated string" , but the ending zero is lost somewhere during transformation of the course .fit file which Instinct makes. So later it reads some bytes following the name string...

Same here, but didn't know how many days ago

This morning the same power training I've doing for almost 2 years with a 645.

After 20 minutes or so it crashed. After reboot it prompted to resume. After a couple of seconds it crashed again.

On the last attempt i didn't crash but it lost all data about the training, basically it became a 30" repeating timer with nameless exercises. Luckily I was also recording the activity via Polar Beat (I was wearing an H10).

I'm definitely returning the instinct next week. What a poor experience.

OK so most definitely isn't just me and my Instinct, which is a good and a bad thing.
I bought this thing only recently and I'm kinda hoping it's something to do with the 7.0 Firmware that can be fixed swiftly with an update.

6619804 said:

but allows UTF-8  characters, which are 2 bytes long

What 6619804 wrote about the reason of the error and limitations, is right - I'd just add an unimportant note about a minor detail - UTF-8 encoded unicode characters are actually long between 1 to 4 bytes, so in fact, if you are not lucky, a single unicode character may add three additional bytes. Not all unicode characters are supported by the Instinct, though, so it is possible that on this specific model the limit of 2 bytes is true. Just noting it, since the same issue is AFAIK a problem on APAC Instinct, and on other Garmin devices as well, and those have often quite different support of unicode characters.

Yes, right. But the only UTF-8 character longer than 2 bytes which I have found that Instinct is able to show is  (3 bytes long ). But I did not check all 65536 combinations . I suppose that for all languages contained in the Instinct 2-byte characters are enough.