Hello Appgenix team,

I would like to report a bug related to Google Tasks synchronization in Business Calendar 2 Pro on Android 15 with Samsung One UI 7.

Device and software:

Device: Samsung Galaxy S21

Android version: 15

One UI version: 7.0

Business Calendar 2: Pro version (latest from Google Play)

Problem description:

I have the same Google account (gmail.com) configured on my device in two places:

As the main Google account of the device (in Android Settings → Accounts).

As the Google account assigned to Business Calendar 2 for synchronization.

On the main device account, Google Tasks sync works correctly – the Tasks toggle in Settings → Accounts → Google stays enabled and background synchronization works.

However, for the same Google account when used by Business Calendar 2:

The Tasks sync toggle in Settings → Accounts → Google → [this account] automatically turns off.

It either switches off immediately when I try to enable it, or it turns off after the first synchronization attempt.

As a result, automatic background synchronization of Google Tasks does not work for the account used by BC2.

Manual sync of tasks from within Business Calendar 2 works correctly.

Calendar events synchronize automatically in the background without any issues – only Tasks are affected.

Steps I have already tried (without success):

Set Business Calendar 2 battery usage to Unrestricted (no optimization).

Enabled Background data and Unrestricted data usage for BC2.

Ensured global Auto‑sync data is enabled in Android Settings.

Cleared cache and data for Google Play Services and Google Account Manager.

Removed and re‑added the Google account inside Business Calendar 2 (not from the system).

Restarted the device multiple times.

Despite all these steps, the Tasks sync toggle for the BC2‑associated account still turns off automatically, and background synchronization of tasks does not work.

Expected behavior:

The Tasks sync toggle for the Google account used by Business Calendar 2 should stay enabled.

Google Tasks should synchronize automatically in the background, similarly to calendar events.

Request:
Could you please investigate this issue on Android 15 with One UI 7? It seems that the Google Tasks sync adapter for the account used by BC2 enters an error state or is being blocked by the system, while the same account works correctly as the main device account.

If you need any additional information (logs, exact device model, BC2 settings export, etc.), I am happy to provide it.

Thank you for your work on Business Calendar 2 – it is my main calendar app and I would like to continue using it with full Google Tasks support.

Best regards,
Grzegorz Parzych