Problem: multisig account failed on threshold encode after send tx

[mmsqe]

Description

Closes: #XXXX

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Author Checklist

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I have...

• included the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
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• reviewed "Files changed" and left comments if necessary
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• updated the relevant documentation or specification, including comments for documenting Go code
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• confirmed the correct type prefix in the PR title
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• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage