Bugfix: mise client is single instance, can't assignLogMessageCallback again

[zhou9584]

Description

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Pull Request Checklist

• Tests for the changes have been added (for bug fixes / features)
• Code compiles correctly with all tests are passed.
• I've read the contributing guide and followed the recommended practices.
• Wikis or README have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

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• No

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• Feature
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• Build related changes
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• Code style update (formatting, renaming) or Documentation content changes
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Feature UI screenshots or Technical design diagrams

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