iOS: Same account, two devices: sent messages not synced

iOS V. 1.1.1 (one device is an iPad Pro the other one an iPhone 11 Pro)

Expected behavior

Same account imported on two iOS devices, messages received and sent should be visible on both devices.

Actual behavior

With the same account imported on two iOS devices, messages received are visible on both devices, the messages sent are only visible on the device where it was sent.

Steps to reproduce the problem

  1. Setup account on iOS device 1
  2. Export and import account on second iOS device 2
  3. Send message to contact on iOS device 1
  4. See conversation on iOS device 2
  5. Check if message sent from iOS device 1 is visible in conversation on iOS device 2

Screen snapshots

Enable BCC self in the settings.

Perfect, thx.