clear resultCh when init a new block

[LeoGuo621]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Reviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[LeoGuo621]

double commit: okx/exchain#3125

[codecov-commenter]

Codecov Report

Merging #119 (5b7367f) into dev (26e49fe) will decrease coverage by 0.01%.
The diff coverage is n/a.

❗ Current head 5b7367f differs from pull request most recent head f4b48ea. Consider uploading reports for the commit f4b48ea to get more accurate results

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@@            Coverage Diff             @@
##              dev     #119      +/-   ##
==========================================
- Coverage   34.20%   34.19%   -0.01%     
==========================================
  Files         423      423              
  Lines       44310    44310              
==========================================
- Hits        15155    15153       -2     
- Misses      28053    28054       +1     
- Partials     1102     1103       +1     

see 1 file with indirect coverage changes