fix #3613 shouldUnregister:false append clone object

[bluebill1049]

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Size Change: +97 B (0%)

Total Size: 97.2 kB

Filename	Size	Change
dist/index.cjs.development.js	15.6 kB	+17 B (0%)
dist/index.cjs.production.min.js	9.13 kB	+12 B (0%)
dist/index.esm.js	15.7 kB	+17 B (0%)
dist/index.ie11.development.js	20 kB	+13 B (0%)
dist/index.ie11.production.min.js	11.4 kB	+7 B (0%)
dist/index.umd.development.js	15.9 kB	+18 B (0%)
dist/index.umd.production.min.js	9.2 kB	+13 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
dist/index.ie11.js	143 B	0 B
dist/index.js	142 B	0 B

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