我认为这是 Firestore JS 客户端库的问题.我将它从版本 7.9.2 回滚到版本 7.9.0 并且错误消失了.

I think this was an issue with the Firestore JS client library. I rolled it back to version 7.9.0 from version 7.9.2 and the error went away.

7.9.3 包含修复.

edit: 7.9.3 contains the fix.