Backport release/v6.3: fix double refund

[jewei1997]

(cherry picked from commit f72a9f3)

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Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Jan 13, 2026, 10:23 AM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.57%. Comparing base (5e91a00) to head (096836c).
⚠️ Report is 2 commits behind head on release/v6.3.

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v6.3    #2694      +/-   ##
================================================
+ Coverage         43.38%   43.57%   +0.18%     
================================================
  Files              1854     1412     -442     
  Lines            153857   117669   -36188     
================================================
- Hits              66758    51274   -15484     
+ Misses            81137    61823   -19314     
+ Partials           5962     4572    -1390     

Flag	Coverage Δ
sei-chain	?
sei-cosmos	37.95% <ø> (-0.01%)	⬇️
sei-db	44.92% <ø> (ø)
sei-ibc-go	55.96% <ø> (ø)
sei-tendermint	47.48% <ø> (-0.06%)	⬇️
sei-wasmd	42.06% <ø> (-0.02%)	⬇️
sei-wasmvm	39.88% <ø> (ø)

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