[bisq-network/bisq] There is an issue with a missing or invalid transaction (#5494)

[pazza]

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### Description

Myself and at least one other user have been experiencing error messages at the time offers are taken.

Related community post: https://bisq.community/t/there-is-an-issue-with-a-missing-or-invalid-transaction-help-needed/10746 

The error message shows as:

>There is an issue with a missing or invalid transaction.
>
>Please do NOT send the fiat or altcoin payment.
>
>Open a support ticket to get assistance from a Mediator.
>
>Error message: Deposit transaction is null or has unexpected input count.

Despite the message everything is ok, seems Bisq is checking the offer too early?

#### Version

Error message started to appear in 1.6.3 and also shows in 1.6.4

### Steps to reproduce

Offer is taken.

Bisq loads offer into 'Open Trades'

Trade that was taken initially shows as failed trade for a few seconds, then updates to a non-failed trade.

User is then shown a error 'pop up' as follows

![bisq issue github 2](https://user-images.githubusercontent.com/66367547/118381125-a70e5180-b5df-11eb-95a1-aa95a81ff23a.PNG)


### Expected behaviour

Error message is not shown for successful trades.


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https://github.com/bisq-network/bisq/issues/5494
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