[bisq-network/bisq] Unable to proceed in trade BUG (#4864)

[kaschmirrr]

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### Description
 I cant proceed in my trade because it doesnt accept when i press "Payment made". It suddenly switches between trading step 2 and 3 and doesnt stay. I think the counterparty (seller) doesnt see the trade as payment done and we arent able to process in the trade. Did SPV resync but it didnt help.
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#### Version
1.5.0
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### Steps to reproduce
Do sepa trade, press "Payment made" and it switches randomly between step 2 and 3 and doesnt stay. Also when i restart bisq it is always back at step 2 until i press "payment made" several times then it switches between 2 and 3 again.
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### Expected behaviour
I expected it to go to step 3 so the seller can send me the funds i bought of him.
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### Actual behaviour
Switches back and forth between step 3 and 2 and we cant complete the trade
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### Screenshots
![Screenshot1](https://user-images.githubusercontent.com/51097237/100517081-89ac0f00-3188-11eb-8a1a-99495f2e819d.png)
![Screenshot2](https://user-images.githubusercontent.com/51097237/100517085-8ca6ff80-3188-11eb-82d2-8c464c70d53f.png)

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#### Device or machine
Lenovo Laptop with Ubuntu 20.04.1 LTS, Core i7, 8gb ram, 1gbit/s internet connection
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#### Additional info
Can provide log file if it helps
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https://github.com/bisq-network/bisq/issues/4864
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