Apple Watch: Long run data and activity sync issues

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Level 1

4 points

Apple Watch: Long run data and activity sync issues

I’m having an issue with my watch when I go on long runs of more than five miles. I did a 6.5 mile run two weeks ago and it took several hours for the run data to synch with and show up on my phone. The calories and activity minutes showed up but not the run in my sessions. Today I ran 9 miles and not only is the run now showing up, but my watch stopped recording any activity at all after the run. No additional calories burned, activity minutes or stand goals. My watch isn’t even reminding me to stand. I turned my watch and phone off more than once. My watch is almost fully charged. I tried unpairing and repairing it with my phone. It is now recording additional calories and activity minutes but still nothing for the stand goal and the run is still mission from my sessions. The software on both devices is up to date. I’m wondering if the fact that I use a custom workout for the runs to time intervals alternating a minute of running and thirty seconds of walking is causing a glitch as that’s a lot of data to record.

Posted on Nov 23, 2025 1:49 PM

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Answer 1

vsrunner

Level 1

8 points

Nov 23, 2025 7:38 PM in response to Gonyr24

I am seeing exact same issue since last few weeks where each time I ran for more then an hour (anything over 6 miles), Watch Ultra 3 is exhibiting this issue. Workouts are either taking much longer time to show up (or sometimes never show-up on the phone (and even on the watch's fitness app) and in the fitness app. Interestingly my shorter workouts (like less than an hour long) are showing up fine (and almost instantly right after I end the workout on the watch). I just think Apple watch is not able to handle a bigger data set (> 1 hr workout data. This is quite frustrating and it never happened to me on previous watch (Apple Watch Ultra 2). This is quite frustrating and unfortunately we have to go through this after buying such an expensive watch. I called Apple support but their diagnosis was not helpful.

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