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 ## Changelog
 ##### Unreleased
-- Nothing
+- Added a workaround of most cases breakage modern `String#at` after loading obsolete `String#at` proposal module, [#1019](https://github.com/zloirock/core-js/issues/1019)
 
 ##### 3.19.3 - 2021.12.06
 - Fixed internal slots check in methods of some built-in types, [#1017](https://github.com/zloirock/core-js/issues/1017)