Calling example_electrum sync on an unconfirmed tx may result in the tx being stuck as unconfirmed eternally (according to the cli))

[evanlinjin]

Describe the bug
Calling example_electrum sync on an unconfirmed tx may result in the tx being stuck as unconfirmed eternally (according to the cli)).

To Reproduce

1. Send a transaction: example_electrum send 123456 <insert-address-here>.
2. Perform example_electrum sync until the transaction is confirmed (according to the block explorer).
3. Do example_electrum balance -> You'll see that the transaction is not confirmed (according to our cli).
4. Do example_electrum scan && example_electrum balance -> The transaction is still NOT confirmed!

The transaction is forever stuck as unconfirmed according to our cli.

Expected behavior

That the tx is viewed as confirmed by our cli.

[evanlinjin]

New discovery: The cli saw it as confirmed after I called scan after one additional confirmation.

[danielabrozzoni]

Re-opening as #1145 didn't fix this

[evanlinjin]

May be fixed by this: #1354