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Garmin Venu 3 intermittently stops syncing with iPhone 15 Pro — duplicate Bluetooth entries and unreliable workarounds

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I am experiencing a persistent and intermittent syncing issue between my Garmin Venu 3 and iPhone 15 Pro. The watch worked reliably for several months, but the problem started approximately 2–3 months ago.

Devices and software

  • Watch: Garmin Venu 3, software version 17.05

  • Phone: iPhone 15 Pro, iOS 26.6

  • App: Garmin Connect 5.27.3.3

Symptoms

  • Garmin Connect intermittently stops syncing, and the Sync button becomes greyed out.

  • Calls and notifications may continue working even when syncing fails.

  • Toggling Bluetooth off and on in iPhone Settings sometimes restores syncing, but this workaround is unreliable and frequently does not work.

  • In the iPhone’s Bluetooth device list, I see two entries for Garmin Venu 3. One consistently shows “Connected,” while the other consistently shows “Not Connected.” I do not know why two entries appear or whether this is related to the syncing problem, but I would like Garmin to clarify whether this is expected behaviour.

Troubleshooting already completed

  • Restarted both the iPhone and watch.

  • Removed and re-paired the watch.

  • Reset iPhone network settings.

  • Reinstalled Garmin Connect several times and checked for app updates.

  • Checked Bluetooth, notification, background app refresh and location permissions.

  • Confirmed Screen Time settings allow the app and that no VPN is in use.

  • Removed Garmin Connect IQ.

  • Reset the watch and checked for iOS updates.

  • Tested with another iPhone, where the issue also occurred.

  • Confirmed that other Bluetooth accessories, including AirPods and my car connection, work normally.

Despite these steps, the problem persists.

Request for Garmin

I would appreciate an investigation by the Garmin Connect Mobile engineering team, rather than another round of standard troubleshooting. In particular, please investigate:

  1. Why two Garmin Venu 3 entries appear in the iPhone’s Bluetooth list, with one connected and the other not connected.

  2. Whether this behaviour is related to the intermittent syncing failures.

  3. Whether there is a known issue involving Garmin Connect, the Venu 3 and recent iOS versions.

The problem has persisted despite extensive troubleshooting, and the available workaround is not dependable. Please confirm whether this is a known issue and escalate it to the appropriate engineering team if necessary.