Unable to connect to Bluetooth GNSS receiver after app reinstall — requires full Bluetooth re-pair as workaround

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#4,587 opened on Jul 7, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 3/5
Estimated time: 1-2 days
Newbie friendliness: 55/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Quiet
Tech stack: android
Domain: mobile

Research direction

Start by reproducing the issue through GPS settings → Connect new receiver → Bluetooth → Continue, using the previously paired receiver after reinstall. Inspect the Android Bluetooth GNSS connection flow and the + action; done means the receiver reconnects without OS-level re-pairing and provides feedback if connection fails.

Written by the indexing model from the issue text.

Description

android 🤖 bluetooth bug GPS

Description
After reinstalling the Mergin Maps app, a previously paired Bluetooth GNSS receiver cannot be reconnected through the app's "Connect new receiver" flow. The receiver appears in the Bluetooth device list, but tapping the + button does not establish a connection and no error is shown.

Environment
[x] Staging [ ] PROD

Application (+ app version, build, operating system)
Mergin Maps Android app 2026.3.0 (RC)
Device: Redmi A3, Android 15

Steps to reproduce

Pair a Bluetooth GNSS receiver with the device and connect it successfully in the Mergin Maps app
Reinstall the Mergin Maps app (uninstall + install)
Open the app → go to GPS settings → Connect new receiver → Bluetooth → Continue
Select the same receiver from the Bluetooth device list
Tap the + button to connect

Actual results
No connection is established. The app gives no feedback — the receiver is not added and no error message is shown.

Expected results
The app should be able to reconnect to a previously OS-paired Bluetooth GNSS receiver after reinstall without requiring the user to remove and re-pair the device at the OS Bluetooth level.

Workaround

Remove the GNSS receiver from the device's Bluetooth settings
Re-pair the receiver at the OS level
Force-close the Mergin Maps app
Reopen the app — the receiver can now be connected via the standard flow

Screenshots or logs

Conclusion
Created by Claude and supervised by a human test analyst.

Dominant language: C++
Stars: 388
Forks: 87
Avg merge: 4d 1h
Merged PRs (30d): 23

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