fix: move deepcopy in tap before fn call

[second-ed]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 21 untouched benchmarks

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_{Comparing dev (7804a26) with dev (316818c)¹}

Footnotes

1. No successful run was found on main (2321c1e) during the generation of this report, so dev (6908eb2) was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩