Hi ​@leonvalentink, are you recording with the Apple Workout app (and then syncing to Strava), or with the AW Strava app?

Both. But 90% with Apple Watch Strava App. The 5 unsynced activities are on the AW Strava App. 

I thought it may relate to the recent Apple iOS update but I also updated the watchOS and the problem still persists. 

ok so if you go to the app’s settings and tap the “unsynced” button (that now probably shows a non-zero number), do you get an option to force the sync? And if it doesn’t work - is there any error message?
 

Yes I can see that, there are 5 unsynced activities listed (that’s why I know it’s 5 as mentioned in my post).
 

The error message is as follows „to sync your activity, make sure your Apple Watch is connected to the network“. 

However, Bluetooth is on, I’m connected to the WiFi, phone is close to watch, I have ¾ bars network… I didn’t change any settings and I’m at home, there was never an issue before.  

There are 5. it says „to sync your activity, make sure your Apple Watch is connected to the network.“ 

Bluetooth on phone is on, phone is connected to WiFi, I have ¾ bars in network. I’m at home, reception is good, never had a problem here. 

Hmm 🤨 that's odd. 

Just an idea… are both the AW and iPhone connected to the same wifi? I have a regular wifi and a guest one at home, and for whatever reason, my phone sometimes connects to the guest network without me noticing. And that causes issues with e.g. smart lights / devices. So perhaps double check that..?

Yes, when I go to setting on my Apple ultra watch, WiFi is on, then I select the Home WiFi (there is only one) in which my phone is also connected. Then go back to the AW strava app and try to manually sync the unsynced activities but the issue persists. Same error message. 🤔🤷🏼‍♂️ I even tried with phone hotspot. I really don’t know what to do or how to fix it.